Jellyfish are some of the most dangerous creatures in the ocean. Just touching the wrong one can lead to a swift death. And now, these people are swimming with millions...
The jury found you guilty. The judge sentenced you to one of the most dangerous prisons on Earth. And if you’re not careful, you could spend the rest of your life...
What if Jupiter’s 79 moons weren’t gravitationally bound to Jupiter? What if they became rogue objects orbiting on their own paths around the Sun? Would they still be...
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...
Mountains. They’re born, they grow, they age and erode. And after a very, very long life, they turn to dust. What if all mountains collapsed at once? What are the...
This blue, marble-like planet looks just like Earth. But only five seconds on this hostile death-orb would kill you. Welcome to HD 189733b. This planet is enormous. Even...
On the morning of September 11th, 2001, tragedy struck when two hijacked airplanes crashed into the World Trade Center towers in New York City. After that, everything...
Welcome to Jurassic World. In real life. Let’s bring back some of the most dangerous creatures to ever roam the Earth. What could go wrong? Right? How would we be able...
Our Solar System has eight planets, a few dwarf planets and more than 200 moons. But wait. Are you seeing double? Or did every planet suddenly get a twin? Where would...
Are we alone in the Universe? With more than 100 billion galaxies in the observable universe and at least 500 billion planets in the Milky Way alone, don’t you...
Our lungs might be fine in that short a time frame, but the rest of the planet? Not so much.
You’re lost in the jungle without any other humans around. You need to find a new family. Or your new family could find you. What would it be like to be raised by...
This star is about to transform into a black hole. And we’re about to travel inside it to see what’s on the other side. The only problem is that we’ll...
If you traveled to the deepest points of Earth, what would you find? Lost cities, mythical sea monsters, rivers of gold? Probably not. But there is still a lot to...
1.3 billion years ago, two orbiting massive black holes, circling each other at 250 times a second, collided in a violent, universe-rippling explosion that sent waves of...
When it comes to energy, we have a long way to go before our utility bills become a thing of the past. On the Kardashev scale we’re still a Type 0 civilization...
Would you spend a night at the top of the first tower to space? At 100 km above sea level, it would be the highest structure that humans have ever built. This tower...
When was the last time a bird pooped on you? Apparently, you have a better chance of winning the lottery than you do of getting pooped on by a bird, which is why some...
You’re in the Ghostbusters universe. With a quick stomp, demons are as good as gone. So how would life change if you could bust ghosts in real life? Would you need...
[dx_custom_adunit mobile_id=”RTK_v1lP”] Take a look at the two most popular energy sources around the world. Oil. Coal. Dirty. Scary. By some estimates...

