Hundreds of meters underground. Large enough to house tens to hundreds of thousands of people. And walls strong enough to withstand the force of a nuclear blast. These...
Are you religious? If you are, a huge part of your life is probably shaped by your beliefs and religious community. If you’re not, you might stare with bewilderment at...
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...
Scroll down to watch the video. Deep beneath the thick layer of million-year-old ice, something is lurking quietly, waiting to rip through the rigid ice sheets. This...
The Arctic might soon become completely ice-free. And when all of the ice is gone, the world won’t be the same. But what if I told you there was a way to prevent...
There are 3.8 billion women on Earth. There were 3.9 billion men. But now, it’s just you…and your phone won’t stop ringing. Is this a fantasy? A...
Several volcanoes around the world are being woken up on purpose. The mission? To use volcanic eruptions to protect the Earth from global warming. In what ways could you...
For over half a century, we’ve searched for radio signals from extraterrestrial civilizations. But it’s, been, well, a little quiet. Are they ignoring us? Or...
This gigantic bat was captured on camera by a man filming his camping trip. He’s been missing ever since. Stories like these have been swirling the internet for...
When you look at the Earth from space, you don’t see the 241 countries and territories that we’ve divided ourselves into. You don’t see the boundaries...
Earth is already known as the blue planet, with 70% of its surface covered by oceans. But what if the remaining 30% of land suddenly disappeared? The consequences would...
China invading the U.S. is something that could turn the world on its head. Could the U.S. mobilize in time to respond? Would this be the start of World War III? The...
Welcome to the Solar System construction zone. Today you’ll be using our cosmic sandbox to build a brand new planet. What would you need to create a rocky planet like...
A total solar eclipse is one of the most breathtaking spectacles in the universe. While we experience them on Earth roughly every year and a half, these events happen in...
At first thought, volcanoes might seem like the perfect natural disposal system. They are incredibly hot, appear to swallow anything in their path, and seem limitless in...
The moon has been our friendly neighbour in the sky for billions of years. It has guided us home, kept us on time, protected us, propelled us into space and has even...
Imagine a world where we didn’t need any lights, where we could detect diseases just by looking at someone, and literally see right through people’s...
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...
As thrill-seekers, we like to do a lot of extreme, gravity-defying stunts to push our limits. If base jumping or caving is your thing, how about taking a tumble all the...
Look out. A burning hot space rock just fell straight into your living room, destroying all the things you care about most. Goodbye, sweet television. How did this...
