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What If You Met a Time Traveler?

What If

6.2M views 7 years ago

Warm-up Questions

If you met a time traveler, what questions would you ask first?
Do you think time travel to the past is possible, or only to the future? Why?
What kind of proof would you need to believe someone is a real time traveler?

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What If You Met a Time Traveler?

A claimed time traveler and the big questions (00:00 – 01:12)

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1. What is the main question at the beginning of the video?

Why we haven't met any time travelers and how we'd recognize one
How to build a time machine at home
Why people in the past feared scientists
Why time travel is definitely impossible

2. Who is mentioned as arriving in 1998 and claiming to be from the future?

A NASA astronaut
Albert Einstein
John Titor
Stephen Hawking

3. What happened after the person described his device?

He proved everything in a lab
He vanished as abruptly as he appeared
He was arrested immediately
He stayed and became famous on TV

What If You Met a Time Traveler?

Relativity: black holes, speed, and a proposed machine (01:12 – 04:13)

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1. According to the video, how did Einstein describe time?

As an illusion created by memory
As a fourth dimension connected with space
As a kind of energy stored in matter
As a force that pushes objects forward

2. What would happen to your time compared to people on Earth if you got close to a black hole like Sagittarius A* (as described)?

Nothing would change
You would experience time at half speed
You would age faster than people on Earth
Time would stop completely for you

3. What did the claimed device use to manipulate gravity?

A crystal that stores time
A chemical fuel that bends light
Solar panels and magnets
Two micro singularities packed inside it

What If You Met a Time Traveler?

Testing the idea: Hawking’s party, wormholes, and possible reasons (04:13 – 07:02)

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1. What was special about Stephen Hawking’s party invitation?

It was only sent after the party took place
It was sent only to other physicists
It was sent years before the party to confuse people
It required a secret password to enter

2. What problem with wormholes does the video mention?

They are microscopic and collapse too quickly
They are too large to control
They only appear near the Moon
They are made of dangerous radiation storms

3. What example of real-life 'time travelers' does the video give near the end?

People who sleep for a long time
Scientists working underground
Passengers on ordinary airplanes
Astronauts on the International Space Station

What If You Met a Time Traveler?

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1. Which idea best matches the video’s explanation of why time might pass differently for different people?

Time changes depending on how old you are
Gravity and speed can affect the movement of time
Time only changes during eclipses
Time changes because of technology

2. What is one suggested way to prove someone is a time traveler (according to the video)?

They must have a different blood type
They should never make mistakes when speaking
They should be able to predict future events or show futuristic technology
They must know every language

3. Why might we still not meet time travelers even if time travel becomes possible?

Because people would not be interested
Because it might be prohibited or not precise enough
Because time travelers cannot communicate with people
Because Earth will disappear soon

Discussion Questions

Discuss the ideas from this video

What If You Met a Time Traveler?

What would count as convincing proof that someone is really from the future? Rank your top three types of evidence.
If time travel to the past were possible, what rules should time travelers follow to avoid causing harm?
Do you think Hawking’s party is a good test for time travel? Why or why not?
Would you personally choose to travel near a black hole to experience time passing more slowly? What benefits and risks can you imagine?