Name: What If You Met a Time Traveler?
Uploaded: 2020-02-19T06:31:02.000Z
Duration: 7 min 2 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

why haven't we met a single time traveler yet?

Past simple

how would we know they weren't faking it?

his time traveling device in great detail.

that someone has traveled from a different time,

Einstein approached time as a fourth dimension.

that provides us with length, width and height.

Together, they form a space-time continuum.

According to Einstein's theory of relativity,

And technically, because space and time are one,

gravity could bend time as well as space.

But you'd need something really, really big

to notice any changes in the movement of time.

creating a very strong gravitational field around it.

The closer you get to the speed of light,

that somehow could travel at 99% of the speed of light,

223 years would have passed back at the station.

That would make you a time traveler into the future.

is what made time travel possible in any direction.

of two microsingularities that were packed inside.

Titor had this machine installed in a car,

pretty much like the good old, time-traveling DeLorean did.

Proving that someone really is a time traveler

might be even harder than time travel itself.

Time travelers could make predictions about the future,

Maybe the best way to prove time travel is real

would be to take you with them on their next adventure.

but one to which only future time travelers were invited.

Hawking didn't send off invitations until after the party.

He believed that if travelers from the future

arrived before the invitation was released,

that would prove that time travel will become possible one day.

That doesn't mean time travel is impossible.

There is a chance that time travelers from the future

will learn to use wormholes, or "bridges" in space-time.

the theory of general relativity predicts that they exist.

is that they're microscopic and collapse too quickly

But maybe the reason nobody attended Hawking's party

is that time traveling might not be that precise.

Maybe the guests from the future did arrive,

is strictly prohibited for time travelers,

Subtitles ListPlay Video

What If You Met a Time Traveler?

approach

experience

spectrum

general