What Earth do you live on? A round one? Flat one? Maybe your world is resting on the back of a huge cosmic turtle? What about a hollow Earth? Just a planet’s shell...
The megalodon, the big boss of our ancient oceans, the king of all sharks, killer of whales. If you’re a fan, you’ve already witnessed our megalodon vs. mosasaur episode...
Deep under Europa’s thick icy surface lies an ocean larger than all of Earth’s oceans combined. But it’s pretty useless way out there. Let’s ship that water back to...
In five billion years, we’re gonna have a hefty problem on our hands. Well, only if we’re still living on Earth at this point. Our Sun will be on the brink...
You just fell into a pool with this thing. What is this? How would falling in here affect your health? And could you actually survive this? This is a spent nuclear fuel...
Whether it’s an act of war or terrorism, all that really matters in the moments after the blast is that there are ways to save yourself and your loved ones...
12. THE SUN IS A GIANT BALL OF FIRE Did you know that the Sun isn’t really on fire? No. Our Sun isn’t a raging bonfire in the center of the Solar System...
Whether it’s Apple, Microsoft, or Yahoo, only one tech giant has reigned supreme when it comes to our search engines. Google. It’s so dominant around the...
The world has ended. The sky has fallen. Doomsday has come and gone. So now what? Let’s start rebuilding civilization, of course. How would you begin to come back from...
Whether you enjoy rock music, or pop, or if classical or jazz takes your fancy, we all love music. But what if we had never invented music? No, rhythms, no melodies...
From space, it would look like Earth had a giant pimple. Smack dab in the middle of Brazil. Back on the ground, you’d be astonished by the enormity of Olympus Mons. The...
Something strange is happening on the outskirts of our Solar System. It could be a large, mysterious planet. Or, it could be a black hole. How big would this black hole...
Serving and protecting the United States is a big responsibility. But its seven services have things covered, even outer space. Tonight it’s sea versus sky as we...
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...
Imagine being able to travel to any point in time. Where would you go, and what would you do? You could witness some of the greatest moments in history or even change...
We’ve thrown a lot of disasters at Earth over the years: from asteroids and aliens, to the Sun’s death. But hey, the Universe is a dangerous place, and we’re not...
Located in the United States, one of the world’s largest volcanoes is gearing up to explode. It’s known as the Yellowstone Volcano, and it’s not just...
A century of history flashes before your eyes. Not the past, but the future. And now you know how life would unfold over the next 100 years. What changes would happen to...
You’re in the deepest part of our oceans. The Mariana Trench. Suddenly, your sub experiences an earthquake. And when you look outside, you see the terrifying...
When you look back through the evolutionary history of life on Earth, it’s important to remember it’s always been a game of survival. And only the fittest...
