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...
Deep beneath the Earth lies a mysterious and powerful force. A wellspring of nuclear energy which could one day rip us apart. Many scientists have found clues that...
“Below the thunders of the upper deep, Far, far beneath in the abysmal sea, his ancient, dreamless, uninvaded sleep The Kraken sleepeth” That’s right. It’s...
Mountains. They’re born, they grow, they age and erode. And after a very, very long life, they turn to dust. What if all mountains collapsed at once? What are the...
Just north of the Martian equator lies a 45 km (28 mi) wide impact crater that scientists believe may have been the site of an ancient lake. Here at Jezero Crater...
Our solar system appears beautifully organized, but its stability is actually the result of an incredibly delicate cosmic equilibrium developed over billions of years...
Welcome to the arena. Tonight’s battle is all about location, location, location. Both of our fighters are extremely territorial. They’re not interested in sharing and...
Throughout history, humanity has faced existential threats like giant asteroids and invisible viruses. Despite the danger, we always bounce back. But how much longer can...
At first glance, it looks like something is wrong. A strange, floating slab of flesh rises beside a fishing boat, as if the rest of the animal is missing. But this is...
Eight planets, hundreds of moons, hundreds of thousands of asteroids, and billions of comets orbiting our Sun make up our Solar System. And not once has a single black...
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...
Imagine waking up one morning to find our Sun replaced by a cosmic powerhouse far stranger than anything we have seen. From giants that could swallow planets whole to...
With so many varieties in our skin tones, hair colors, and features, the human race is a marvel of evolution. But what if we all decided to preserve our family traits...
Humanity has always looked up at the night sky and wondered what is hiding out there. Entire galaxies, black holes, strange planets, and maybe even alien civilizations...
Imagine being transported 500 million years into Earth’s past, landing in a world that feels both alien and dangerously unfamiliar. You have just arrived in the Cambrian...
Bleak landscapes, soldiers in gas masks and mutant creatures running through the Red Forest. Basically, a perfect place for you to spend a month. Welcome to Chernobyl...
Is alien life really out there? Humanity has wondered about it for decades, and according to scientists, this might finally be a reality. Astronomers have discovered...
What if there was another version of you? Somewhere out there in the Universe. A you that could be anything. Imagine a version of you where you’re the Batman. Or...
Swipe down for full video story! Mosquitoes are the deadliest animals on Earth, responsible for nearly one million human deaths each year. They transmit diseases such as...
Imagine this a black hole, one of the universe’s most extreme objects, is hurtling straight toward Earth. Rather than waiting to be swallowed, humanity decides to fight...
