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EPISODE · Apr 26, 2026 · 4 MIN

Time Travel: Is the Future Already Written?

from Window to the Future · host Thomas Rackers

Time is the ultimate mystery. In Episode 21 of Window to the Future, we explore the science of time travel. From Einstein's Relativity and the "Slow Motion" aging of astronauts to the mind-bending Grandfather Paradox and the Block Universe Theory. Is it possible to change the past, or is everything we do already set in stone?  

What this episode covers

Time is the ultimate mystery. In Episode 21 of Window to the Future, we explore the science of time travel. From Einstein's Relativity and the "Slow Motion" aging of astronauts to the mind-bending Grandfather Paradox and the Block Universe Theory. Is it possible to change the past, or is everything we do already set in stone?

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Time Travel: Is the Future Already Written?

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Frequently Asked Questions

How long is this episode of Window to the Future?

This episode is 4 minutes long.

When was this Window to the Future episode published?

This episode was published on April 26, 2026.

What is this episode about?

Time is the ultimate mystery. In Episode 21 of Window to the Future, we explore the science of time travel. From Einstein's Relativity and the "Slow Motion" aging of astronauts to the mind-bending Grandfather Paradox and the Block Universe Theory....

Can I download this Window to the Future episode?

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