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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。宝马上线娱乐博彩公司

ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

永利官方在线官网ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

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ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。

ravel Survive ae a Theory of Everything 时间旅行在时间旅行在万有理论下可行吗吗?Tom Siegfrid 汤姆·西格弗里德 many univererses, typicallly those on TV V shows or in m movies, time t travel is not ot much more di difficult than drivingdowntown in y major city duty during rrush hour.In reeal life, time travel n't so easy. I fact, it's proobably impossibossible, a fanasy more fched than visitvisiting Al's Wonderland, d, finding at the end o a rainbow or cleansingng all the  speech off Facebook.Yet time trav does not nessarily violatte the laws physics. In nstein's theeory of gravityity — general relativity — space and tme are meras spacetime, which allows for the  possibili pathways thathat could bend d back to thast and looack to the futre. Such pathths are known own as closimelike curvNobody thinks t that generelativity'time loops wouwould be pracical for time travel even ifif they are pssible. For  thing, th might exinly under certtain circumsnces — theerse would he to be rotang, and noanding — as thethe mathematiciician Kurt del showed in in the 1940s.ut the univere is expanng, and probablobably isn't rrotating, so thhat dampens te prospects f for revisig the Stone e or acquiring ring a pet d dinosaur.Beesides, eveif such paways did ex building ip to traverserse them wld cost more thre than all tl the DeLo (and all or transportation vehicles) ev) ever made. would need a cruising sp speed of 140,140,000 miles es per secon. And with no p place to stop for gas (orwhatever), th the fuel ank would to be more than a trillionn times the size of an o oil tankeSo for practicacal purposes, ime travel's time has not arrived. even if ipossible only nly in principiple, the potial ramifictions for tasic physics of the unse might mt worth the tiime to invgate it.A firstfirst step woul would be to o attempt to fiigure out ctly what th relevant lawsaws of physics s really are. Einstein's geneneral relaty is greatut indubitablly not the last last word ababout the phycs of the univuniverse. fter all, coexists uneaily with qutum mechanicswhich rules  subatomicld and presumably, sin everything  made of subatomic stufuff, the restf the univere as well. W Whether tantum–general relativitycombo truly  permits timeravel might deepend on what  the ultimateorrect they combining  the two tns out to be.Several candidatidate theoriehave been developed for mergging general l relativity any and quantumm mechanicto a unifi theory. It an open queson whether tthese candidates would allllow time travetravel in something like ththe way geneal relativity does, philoosopher Christian Wüthrich of the University of G Geneva notes in a new pap.It's possibble, he sahat a theory hat supersededes general elativity mig still in some way includ the equivalennt of general relativity's timelike loops.Even if tiif time loops ps exist in thethe fundamental theorough, there's 's still no guuarantee tha they woul be preserd in the emmergent larcale spacetime that would b relevant ireal life.r that matter, , Wüthrich pints out, icting the ex existence of t time traveel loops miht be takeevidence agnst the theoreory, considering the erious likeod that titravel realy isn't possssible at all.In any ase, investigatgating whether r quantum ity theories s retain genal relativity'ty's time travel loophohole can iuminate many toy tough quetions that mut be answeto develop a successful theoryry and understnd how it relates to general relativivity. “Fors reason alone,lone,” Wüth writes, “the qhe question oftime trave beyond genl relativi is worth our  while.”在许多多宇宙,通常是影视剧中的宇宇宙,时间旅行并不比高峰时段高峰时段在任何一个大城市的区开车困难多少。