Name: なぜタイムマシンはすでに存在しないのか？ (Why Don't Time Machines Exist Already?)
Uploaded: 2021-01-14T07:05:31.000Z
Duration: 3 min 37 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Have you ever wondered why we don’t have time machines already?

Surely with all the technological wonder of today, someone would have figured out a way

for me to go back in time and ask my animator why he didn’t give me bigger muscles.

Let’s see if we can go back in time and convince everyone we’re all named Calvin

Klien… we just need to get a DeLorean first.

I mean you travel in time whether you’re just sitting there, walking the dog, or even

But I know, I know, that’s not what we’re really asking.

We want to know if we can travel in time faster or slower than we typically do, or if we could

potentially even travel /backwards/ in time.

The answer to at least part of that is a big ol’ yes!

We can relatively change the speed at which we travel through time.

Popularized in 1905 by the great Albert Einstein, the theory of special relativity determined

that time does not pass at the same rate for everyone.

Through a phenomenon called time dilation, an observer moving relatively fast would measure

time passing more /slowly/ than a relatively stationary observer would.

This means that in a relative sense, time passes more slowly for Usain Bolt while he’s

running a race than when you’re chilling at home, watching a brand new episode of Life

This is also why an astronaut sent into space would age slightly /slower/ than their twin

It’s not just simply speed though; more gravity also makes time slow down as well.

This was determined from Einstein’s theory of general relativity when he realized that

massive objects cause a distortion in space-time.

Clocks closer to a massive object, like the Earth, would seem to tick more slowly than

That’s why your feet are probably a super tiny bit younger than your head is.

That is, unless you’re doing handstands all day.

But what about traveling backwards in time?

While it might not be the best to completely rule it out as a possibility, quite a few

scientists believe that it could never really happen.

Stephen Hawking is one of the brilliant scientists that has thought we can’t travel back in

time and he threw an interesting party to give validity to that point.

He threw a big party, but only publicised it /after/ the party was over.

In theory, if people could travel back in time, then they could have heard about his

party in the future and traveled back to attend the experiment in time travel… but nobody

While this obviously doesn’t prove that time travel to the past isn’t possible,

I don’t know about you, but I would have traveled back in time if I could to hang out

That said, there are some that believe time travel to the past might be possible utilizing

some super awesome things, like wormholes for instance!

Not to mention, there might be a way to travel back in time using certain laws of physics

come back every Monday for a brand new video.

As always, I’m Blocko and this has been Life Noggin.

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なぜタイムマシンはすでに存在しないのか？ (Why Don't Time Machines Exist Already?)

weird

episode

massive

awesome