Io. One of Jupiter’s four largest moons, it’s a world that seems ripped straight from a science fiction nightmare. Its surface is a chaotic, constantly shifting...
Welcome to Earth City. Yeah, you heard that right. You’re not going on a globetrotting tour to see all the planet’s major cities. You’re already there. Today, the entire...
We visit a lot of planets here on WHAT IF, but K2-141b is the most extreme one yet. Are you ready to jump on board this one-way space shuttle? If you’d rather stay...
You’ve seen politics and national borders change all the time, but have you ever witnessed a continent literally breaking apart? Well, it’s possible...
That star at the center of our Solar System, that superhot ball of plasma that gives us heat and energy, and amazing complexions… well, it’s a ticking time...
A black hole is on a collision course with our Sun. And there’s nothing left for you to do except sit back and watch the destruction of our entire Solar System. How...
Look out. There’s an object hurtling toward Earth at the speed of light! And no, it’s not a comet or an asteroid. Yep. It’s a marshmallow. How could a marshmallow ever...
Cities have been named after it, economies have been built on it, wars have been fought over it, your life depends on it. Salt may be the most important, and the most...
What would happen if all the volcanoes on Earth erupted at once?
Get ready for the most epic party of your life. Because someone replaced our Moon with a disco ball. How could you turn the Moon into a classic disco ball? How much more...
How much water would you need to extinguish the Sun? How would we deliver such an enormous amount of water anyway? Would all that water even make it to the star...
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 most people think of terrifying places, outer space often comes to mind. After all, it is a vacuum of extreme temperatures, high radiation, and deadly vacuum...
It’s invisible, deadly and sucking up every bit of matter in its path. The most massive black hole in the known Universe is headed right toward Earth. What would you see...
Swipe down for full video story! The construction of the pyramids of Giza required immense labor and coordination. For those involved, daily work was physically...
Climbing the world’s tallest mountains is a daring adventure. But you’re about to make an epic extraterrestrial trek on the biggest mountain in the entire Solar...
That’s no moon. It’s a space station. The enormous, planet-killing kind, designed for only one thing — to bring order to the galaxy. It’s Star...
What if in a stunning move, Russia, one of the largest energy producers on Earth, decided to cut itself off from the world? This heavily armed dictatorship has declared...
What if the Moon was more than just a lifeless rock? Under that bright light, it could be hiding an alien civilization. When did this alien life begin on the Moon? What...
40 km (25 mi) off the coast of Brazil lies an island so dangerous it’s illegal to visit. But rules don’t apply to you. You’re a thrill-seeking...
