There are places in the Universe where you could turn to ash, freeze to death or be completely crushed by gravity. And you’re about to visit them all. What...
The Amazon rainforest stretches for millions of kilometers, hiding ancient tribes, animals and maybe something else. What if under this mysterious canopy lies an...
They’re big. They’re green. They could be human-eating machines. Why not go ahead and take a dip in a pool full of alligators? How could you fight them with your bare...
In 2021, the U.S. government released a report of alien sightings over the past 20 years. This report featured 144 sightings, mostly witnessed by military aviators. Only...
At Yellowstone National Park, all that stands between you and a pool of boiling, rotten-egg-smelling, acidic water is a humble boardwalk. And your good judgment. Stray...
Tritium. It’s that mysterious glowing element found in air, water and now inside you. That’s right. You’re going take this radioactive isotope and chug...
Breaking news. Flags are flying at half-staff. The world mourns the death of a beloved monarch. Queen Elizabeth II has passed peacefully in her Balmoral Castle in...
Earth has gone through at least five major ice ages in its history. And you better start adapting now. Because another ice age is about to begin. Hypothetically. How...
What if I told you Latin America could have hosted one of the world’s greatest superpowers? Capable of changing the course of history in ways that only players like the...
Have you ever felt a surge of adrenaline when you stomped on a bug? Well, imagine how this guy is about to feel. Call the army, heck, call your mom, because the end is...
Get your bone flute and gather around the fire. Today on What If, we’re taking you back to the time of woolly mammoths and saber-toothed cats. That’s right...
Millions of years ago, all the continents were one. Waiting to crack and spread into the world we know today. Thing is, Earth’s ground is constantly moving. So how about...
LIQUID MERCURY This shiny metal is always in a liquid state. It’s much denser and heavier than water. And if you jumped into a pool of this stuff, you’d...
Some of the planets in our Solar System are gigantic. But what if they got even bigger? Let’s go up the planetary size chart and see what kind of chaos doubling the size...
Ashes and smoke cover the sky. Your hometown is sieged by massive wildfires. You rush to escape. Unaware that behind you, the wind and the heat have created a monster. A...
A rogue star is headed straight for our Sun. If these two stars slam into each other, it could spell the end of all life on our planet. How could a rogue star end up in...
It’s been over 200 million years since South America broke off Africa into its own continent. But now it’s behaving very strangely. It’s taking on water and going down...
The Sun isn’t the biggest thing in our Solar System. And it’s not Jupiter, either. But close. It’s Jupiter’s very own magnetic field. What would it be...
Taller than a six-story building. Longer than three school buses. Ten times as heavy as an elephant. The largest dinosaur ever is coming back from extinction. What would...
Oh my. Have you done something different with your peepers? Like maybe swapped them out for a pair of freakishly oversized fly eyes? They look functional. How would you...
