Countdowns

Humans have been fighting viruses throughout history. Here are the 12 viruses that are the world's worst killers, based on their mortality rates, or the sheer numbers of people they have killed.

Antelope Canyon is possibly the most beautiful rocky landscape in the world. Here's a look at the stunning formations in a national park.

Because sharks are jawsome.

Our planet's climate is bananas.

This jet-powered car called Bloodhound aims to break the sound barrier and then break the land speed record.

Archaeologists near Luxor, Egypt, have discovered 30 sealed wooden coffins with mummies inside, some of which belonged to ancient Egyptian priests. Here are photos of the findings.

These ruined stone buildings hidden in the forest in the Scottish Highlands would have been an ideal site for making illicit whisky.

The American pika may look more closely related to a hamster or a guinea pig instead of their rabbit/hare cousins.

Things that make you go whoa!

Ever had a wandering womb?

From pigs on trial to hairless faces, discover what went viral in the Middle Ages.

The western diamondback rattlesnake is the largest of the 32 known species of rattlesnakes found in North America. Here's how you can tell it's the western diamondback.

Animals are amazing hiders, using their camouflaged coats to blend in with their environments and appear invisible.

Here's a look at the damage wreaked by the monstrous Hurricane Dorian.

As Hurricane Dorian pummels the Caribbean and the U.S. East Coast, NASA satellites and space station astronauts are keeping an eye on the epic storm from space.

Cedar Breaks National Monument is one of the geological paradises of the Colorado Plateau and well worth consideration for a visit.

This national park in Utah is home to three of the most spectacular natural bridges created by rushing water and jittery tectonic plates.

Would not have guessed it.

The 28 species of bats that make their colonies in Arizona all belong to the Microchiroptera sub-order.