In 2017, scientists discovered the first known interstellar object in our Solar System. Meet Oumuamua, which means “scout” in Hawaiian. According to NASA...
Under extreme circumstances, humans can often pull together to overcome great odds. But when confined in a tight space with each other, well, we may not be at our finest...
Human beings have existed for 300,000 years and have managed to live in many unstable environments. We’ve survived ice ages, devastating pandemics and world wars...
What if everyone on the planet coordinated to perform the biggest “flush mob” in history? Pushing all the wastewater in the world down the drain, all at once...
Scroll to the bottom to watch the video. They’re not the biggest falls on Earth, not by a long shot. But they’re certainly among the most famous. Niagara...
Wait a minute, Neanderthals are extinct? Before you laugh, check yourself. Neanderthal DNA is 99.7% identical to our own, and researchers claim that some humans might be...
Everybody loves a good sleep, but we probably wouldn’t enjoy it as much if we had no control over when it happened. Imagine falling into a deep sleep during a...
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...
Some places in the Solar System have some pretty expensive rain falling on their surface. Let’s see if we could bring those home. What would it take for Earth to...
What if there are other universes, just like ours? With an infinite number of Earths? With uncountable versions of you? And what if we don’t have to look too far...
Ah. The Sun. So bright. So hot. Time to jump into your super heat-resistant spaceship and get so close you could touch it. If you dare. How would you get to the Sun’s...
Technically speaking, this marine reptile wasn’t a dinosaur, although it sure swam the Earth alongside many of them. Styxosaurus lived 70 to 85 million years ago, in the...
What if humans had gills and could breathe underwater just like fish?
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...
Every time you watch a thunderstorm outside your window, you’re witnessing the energy of an atomic bomb. Now imagine harvesting that raw energy and using it to...
Buckle up as we submerge you in the most dangerous things known to humanity. From painful stings to severe frostbite, this journey could get fatal quick. Can you make it...
Plastic surrounds us in ways most of us don’t even notice. From the toothbrushes we use in the morning to the water bottles in our hands, plastic is everywhere. But have...
Thousands of satellites and pieces of debris currently orbit our Earth. They provide us with television, internet, and communications. But what if all these satellites...
Do you ever question the nature of your reality? Are you real? Or are you a product of some complex computer simulation? What I’m about to tell you might change...
How would the world change if, all of a sudden, every biological man disappeared? Would the world become more peaceful? Why would you have to ration food? And why...
