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  • Time travel to the past is basically impossible without breaking some laws of physics and acquiring plutonium from some Libyans.


  • But time travel to the future is easy; we're all doing it right now.


  • So why does time go forward and not back?


  • The idea that time only flows in one direction is called the Arrow of Time.


  • But, odd as it sounds, there's nothing in the equations that describe the laws of physics that says it has to be this way.


  • The equations can tell you what will happen in the future or what took place in the past based on what's going on in the present,


  • but they don't explicitly state that time must go from past to present to future.


  • The math works just as well going either direction.


  • The one thing that seems to keep driving this time bus to futuretown is the second law of thermodynamics, which states that entropy must always increase.


  • Things must go from order to chaos; heat must disperse from hot bodies to colder ones.


  • This increase in entropy is what keeps the ordered past behind us and the increasingly messy future ahead.


  • But there seems to be a loophole in the second law of thermodynamics, and scientists recently exploited it to turn entropy on its ear.


  • Apparently the law doesn't apply to correlated particles, which are like entangled particles, but with less of a connection.


  • When researchers observed a hot hydrogen nucleus that was next to a cooler carbon nucleus inside a trichloromethane molecule, the nuclei behaved as expected: Heat flowed from the hot hydrogen to the cool carbon.


  • But when they tried the same thing with correlated hydrogen and carbon nuclei, the opposite happened.


  • The hydrogen got hotter, while the carbon chilled even more.


  • This is akin to putting a hot coffee cup in a cold room and watching it heat up as you feel the room get colder.


  • The scientists went on to make the bold claim that this experiment shows the reversal of the Arrow of Time.


  • But even if that's indeed what's happening, it looks like it only applies under very specific circumstances on an atomic scale.


  • So, not that I'm a physicist or anything, but did you reverse the Arrow of Time ?


  • Does that mean time is suddenly running backwards or is there something else at play with these atoms here?


  • Needed is research more.


  • I wouldn't exactly predict a future where broken coffee mugs spontaneously reform or rooms tidy themselves just yet.


  • Special thanks to DOMAIN.COM for sponsoring this episode of Seeker.

    今回の Seeker のエピソードを支援してくれたDOMAIN.COMに特別な感謝を。

  • DOMAIN.COM is awesome; affordable, reliable, and has all the tools you need to build a new website. はすばらしく、 手頃で、信頼でき、新たなウェブサイトを作る時に必要な道具を揃えています。

  • They can fulfill all of your website needs.


  • They offer .com and .net domain names and intuitive website builders.

    com と .net のドメイン名を提供し、直感的なウェブサイト業者です。

  • They have over 300 domain extensions to fit your needs, from .club, .space, to .pizza!

    彼らはあなたの要求を満たす300種以上のドメインエクステンションを保持し、 .club から .space 、 .pizza まであります。

  • Take that first step in creating an identity online and visit DOMAIN.COM.

    オンライン認証を作る最初の一歩を踏み出し、 へ訪れてください。

  • If you've watched all our past episodes, then please subscribe for our future ones.


  • If you haven't seen them all, check out this video on how your perception of time can alter if you speak another language.


  • In the distant future, when the entropy is at its maximum, there will actually be no Arrow of Time, because nothing will be able to change.


  • Thanks a lot for watching Seeker.

    Seeker を見てくれてありがとうございました!

Time travel to the past is basically impossible without breaking some laws of physics and acquiring plutonium from some Libyans.



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B1 中級 日本語 エントロピー 原子 法則 水素 冷たい 未来

科学者たちは時間を逆行させたと主張していますが、実際にそうなのでしょうか? (Scientists Claim They Made Time Go Backwards...But Did They?)

  • 497 23
    Jerry Liu に公開 2021 年 01 月 14 日