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...
As you set out to enjoy a nature hike, the bushes start to rattle. And since it’s not a windy day, that means you have company. There is no such thing as a solitary hike...
Trees have been standing silently beside us for thousands of years. They have witnessed changing climates, the rise and fall of civilizations, and countless generations...
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...
Just north of Mars’ equator lies a 45 km (28 mi) wide impact crater known as Jezero Crater. Scientists believe this location may have once held an ancient lake, making...
When it comes to the question of which planet humanity could one day call home, the obvious choice might seem to be Mars. But surprisingly, Venus might actually be a...
Spanning more than 66 million years, the Cenozoic Era shaped the world we live in today. From the rise of mammals to the emergence of modern humans, this era tells a...
Most insects are harmless, and many play an important role in the environment. But a small number possess painful stings, toxic venom, or defensive chemicals that can...
Earth can be full of extremes. But today, there is only one extreme. Non-stop earthquakes that last an entire year. What would it be like to live under such shaky...
Electric cars have always seemed like the wave of the future. Countless movies have made us yearn for cars that run on batteries and can be charged from the owner’s home...
The Amazon rainforest is often described as one of the most important ecosystems on the planet, yet it is also one of the most threatened. Every year, large sections of...
The most deadly predator of the sea spent its day conquering and terrorizing every creature in sight. This is the megalodon. It lived millions of years ago, but...
Welcome to the longest staring contest of your life. You’re about to go seven days without blinking. What device would keep your eyes forced open? How long would it take...
Nature has spent millions of years solving problems that humans are only beginning to understand. Some animals have evolved remarkable abilities to heal wounds, resist...
When a piece of space debris connected to a SpaceX mission crashed into the Moon, it created a wave of curiosity around what happens when humans leave their mark on the...
You hear a powerful explosion. The cabin fills with smoke, passengers begin to panic, and the aircraft starts losing altitude. The fuel supply is running low, and the...
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, and...
You probably already know that tanning under UV lights isn’t good for you. But to see just how harmful tanning beds can be, we’re going to crank up your exposure time...
Most of Bhopal was asleep when the disaster began. It was late on December 2, 1984, and millions of people had settled into the night, unaware that a deadly chemical...
Across parts of the United States, deer are being found acting in ways that seem almost impossible to explain. Some stumble through forests, lose their balance, drool...
