During Earth’s early days, a gargantuan collision left our planet spinning at an angle. That slight incline allowed life as you know it to flourish. But what if this...
OK, if you’re a regular viewer of What If, you know we’ve already explored the idea of finding silicon-based alien life. But what if we didn’t have to...
Greetings, future moonling. That’s right. You are among the first generation of children born on the Moon. How would your birth compare to every previous human’s...
Welcome to your worst nightmare. You’ve lost your balance and fell into a pool of slimy parasitic animals that eat only one thing. Your blood. What would happen if...
Before you cannonball into that refreshing pool, look before you leap. It could just be filled to the brim with blood-sucking lampreys. And they’re hungry. How would...
Absolute zero is the lowest possible temperature in the Universe. Nothing gets colder than that. So if the entire Earth suddenly cooled down to the most frigid...
What’s the best place to put solar panels? Close to the Sun, of course. And in this scenario, we’re going to build the most efficient solar farm possible...
For every three people who attempt to climb the world’s deadliest mountain, one will die. And now it’s your turn to give it a shot. You’re looking at...
Waves that travel across the ocean as fast as a jet. They are 30 m (100 ft) tall. And can uproot trees and move houses. So why do people always think they can outrun...
What do a doll that can eat a child’s hair, a cancer-causing science kit and a deadly prop gun all have in common? They’re all real toys that were once...
This is an experience like no other. For one of the most unforgettable views in the world, you’ll have to navigate slippery staircases, terrifying vertical ascents and...
Beware. After many millions of years, the T. rex is back. And this giant, scary predator is setting its hungry eyes on you. What would running into this dinosaur be like...
