When scientists search for alien life, they usually look for planets that resemble Earth. The reasoning is simple. Every known living thing depends on liquid water...
Few environments on Earth are as unforgiving as the desert. Humans are built to survive within a fairly narrow range of temperatures, and we depend on a steady supply of...
Your day at a marine park went terribly wrong.You got so excited that you didn’t watch your step and fell into a tank filled with 9 m (29 ft) killer whales. Now...
The ocean is often described as Earth’s last great frontier, a vast and mysterious world that continues to challenge even the most experienced explorers. In May...
Jetpacks have come a long way from the clunky machines once seen in science fiction. One day, they might even become practical enough for short trips. But imagine taking...
What if we took everything that sustains life on this planet, and shrunk it down to one small bubble? Earth’s biosphere stretches about 20 km (12 mi). From the...
Our planet has survived the billions of years of catastrophic events that made it the world we live on now. But one day, there will be an event so disastrous that it...
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...
Halley’s Comet is one of the most famous visitors in our Solar System. It is a massive, peanut shaped object made of ice, dust, and frozen gases, stretching roughly 15...
In October 1974, Rhonda Stapley, a young pharmacy student at the University of Utah, was waiting for the bus to campus when a Volkswagen Beetle pulled up. The driver was...
What if we told you that within the next 100 years, humans could merge with AI, control the weather, and even bring extinct species back to life? From space exploration...
The weather outside is frightful, but the fire is so delightful… …So why not crawl up beside it and go to sleep until the seasons change? That’s what...
Throughout history, there have been many incredible civilizations that have shaped the way we live today. One was Ancient Rome, a once majestic and thriving city whose...
With nearly eight billion people on the planet, things can feel pretty crowded. Let’s make things a bit tighter by housing every single person on Earth in one giant...
On Earth Day, we’re reminded just how delicate and interconnected our planet’s systems really are. From the air we breathe to the water we drink, even the smallest...
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...
Leopard attacks on humans have a long and disturbing history in India. Between 1875 and 1912, thousands of people were reportedly killed by leopards across the country...
Scientists Reached the Bottom of the Mariana Trench, and Something Far Stranger Was Waiting Below
Far beneath the surface of the western Pacific sits one of the most punishing environments this planet has to offer. The Mariana Trench was never meant to welcome...
In March 2011, Japan was shaken by one of the most powerful earthquakes ever recorded. A magnitude 9.0 quake ripped through the east coast, triggering a massive tsunami...
This safari incredible. You’ve seen lions, cheetahs, and other amazing wildlife. Your friends are going to love these photos. Suddenly, the ground starts shaking...

