Zap! How electric eels create their shocks

Colorful or plain, skinny or chubby, big or small, the nearly 2,000 species have it all.

Vaccine skeptics might see vaccines the way they do because they tend to overestimate the likelihood of rare negative events.

How do scientists figure out even basic facts such as whether an animal walked on land or swam in the sea?

Researchers classify an animal behavior as play when it doesn’t involve an external reward, such as food, seems to serve no purpose, occurs repeatedly, and happens when the animal is relaxed and not facing threats.

Scientists find clues to how the earth's climate is changing by looking to the past.

Demand for rare earth elements is soaring, and it will continue to grow in the future.

When the bismuth combines with the trace amounts of sulfur in your saliva and in your gastrointestinal tract, it reacts to form a black substance called bismuth sulfide.

King Tutankhamen of Egypt has fascinated people ever since archeologist Howard Carter discovered his splendid tomb in 1922.

Bitterness, like sweetness or saltiness, is one of the major taste sensations. And while it makes our food flavorful, detecting bitterness can sometimes be a warning that we’re eating something toxic.

What's your earliest memory?