This brilliant physicist worked to crack open the mysteries of the universe. Check out the time line below to learn about the life of this legend.

Get the inside scoop on how these brown bears pack on the pounds to prepare for winter, and see before-and-after pictures of ...

From bottom to top, a mountain has several biomes of life. At the very bottom, foothills often have lush deciduous forests, ...

You’ve met the characters—now meet the real-world animals behind some of your favorites from Pokémon GO. Take a look at the ...

Every March or April, Mexican Free-tailed bats (tadarida brasiliensis) migrate up to 1,000 miles from their winter home in ...

Daniel Radcliffe, who played Harry Potter in the films, wore 160 pairs of prop eyeglasses and waved around 70 wands ...

Forests make up one-third of Earth’s land surface, or more than 15 million square miles. Take this just-for-fun quiz to see ...

These games challenge you to find shark pairs and spot differences in photos of these creatures. Plus, get facts about sharks along the way!

You probably know sea stars as starfish, the name sea stars are commonly known by. But sea stars aren’t really fish. Sea ...

Kamri Noel and four of National Geographic’s experts find out how things work.

Think all sharks are gigantic, toothy eating machines? Think again: With more than 500 species of sharks, you’re sure to meet a few that surprise you. For instance, some sharks have teeth so small ...