We think of space as an icy void, where temperatures drop to hundreds of degrees below zero and astronauts need layers of thermal protection just to survive. But what if...
But how would a second moon affect the ocean tides? Would months on Earth become longer or shorter? And would these two satellites inevitably collide to cause a massive...
If you traveled 10,000 years into the future, what would planet Earth look like? Would most of its surface be covered in volcanoes? Or would it be frozen in ice? What if...
Doesn't it suck having a noisy neighbor? Or constantly running into your ex? We all need personal space, but often find we can't get enough. Don't you wish the world was...
Imagine standing on the surface of an alien world nearly 600 light years away from Earth. The sky glows dim red instead of blue. Strange plants sway in the cold wind...
Imagine waking up on a version of Earth where the sky glows yellow, the air scorches your lungs, and the ground melts your shoes. That is what life would look like if...
Picture the most dangerous liquid you could possibly fall into. Most people think of boiling acid, or molten rock, or water swarming with something venomous. All...
1. The Earth Rotates Every 24 Hours No matter how many times you set it, your watch will always be a little off. That’s because the common belief that our planet...
On the waters of the Amazon, an ancient world flows below your feet. But make a wrong move, and part of this world may end up inside you. Better get out of the water...
You’re enjoying a cross-country drive, but you’re getting hungry. As you pull in for gas, you notice some sushi, and it looks delicious. So you buy some to...
Some people have gone weeks, months, and even years without washing their hair. In some cases, they try special routines that avoid shampoo entirely. With the right...
The most deadly predator of the sea spent its days conquering and terrorizing every creature in sight. This is the megalodon. It lived millions of years ago, but imagine...
Something is very wrong with our Sun. It’s turned into a spinning lighthouse of death. What would make the Sun so much more deadly than usual? Would there be any way...
Few inventors in history have become as famous as Thomas Edison. With more than 1,000 patents attached to his name, Edison helped shape the modern world through...
In the dense forests of Australia lives one of the most extraordinary sound imitators in the animal kingdom, a bird capable of copying almost any noise it hears with...
Imagine looking up at the moon and seeing space dust floating around it. Maybe broken-off parts of the moon are raining down on Earth. You’d wonder what happened;...
Imagine waking up one morning and looking outside to find that everything has turned blue. The Sun is still shining, but something is very different. Instead of...
Legend has it that somewhere beyond Neptune and Pluto, there is a ninth planet, with a mass that is five times greater than Earth’s. Planet Nine, also known by its...
Every morning or every night. Before going out. Definitely after the big game. For most people, showering is routine. But for some, it’s religion. But if lots of...
What if all the oceans disappeared from the Earth’s surface? What would a world with no high seas look like? What would happen to all the creatures that...
