What If

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An epic exploration of possibilities. Join Peter and explore science-based hypothetical worlds across space, technology, Earth, and prehistoric history. Each...

Latest Videos

What if you lived through Milkdromeda

What If Voyager 1 Crashed on an Alien Planet

What If Earth Became a Type III Civilization

Nuking Every Planet in the Solar System

The True Scale of the Largest Objects in the Universe

What If You Grew 1cm Every Second

What If You Dug to the Earth's Core

How Fast Would You Die on Every Kepler Planet

What If Betelgeuse Replaced Our Sun

The Entire History of Earth Condensed into 27 Minutes

What If You Traveled to Before the Big Bang

What If You Landed on Every TRAPPIST Planet

Earth Becomes a Moon What If Saturn Took Over

What If You Watched a Sunset on Every Planet (SIMULATION)

What If You Fell Into the Biggest Void in the Universe

What If You Visited the Universe's Deadliest Environments

What If Exoplanets Replaced Our Solar System

What If the Quetzalcoatlus Never Went Extinct

What If The Largest Objects in the Universe Collided

How Would You Die During Every Mass Extinction

What If We Swapped Our Moon With Other Planets

Your Voice Sounds Completely Different on These Planets

What If You Traveled to Earth 2.0

What If a Black Hole Flew By Earth at the Speed of Light

What If 3IATLAS Collided with Earth

What If You Lived on Mars 1 Billion Years Ago

What If We Swapped Our Moon With Other Moons

What If You Tried to Survive in the Clouds of Venus

I Tried to Land on Venus

What If Every Asteroid Hit Earth at Once (SIMULATION)