Humans
- Humans
Island extinctions
Many of Australia's largest animals died out after people came to the island continent.
-
- Health & Medicine
Hot Pepper, Hot Spider
Hot peppers and spider venom can cause the same sort of painful burning sensation.
- Health & Medicine
Disease Detectives
This year's top young scientists faced medical challenges in labs at the National Institutes of Health.
- Humans
Oldest Writing in the New World
Signs carved into a stone slab may represent the earliest known writing in the Americas.
- Health & Medicine
Getting Enough Sleep
Kids and teens need plenty of sleep but have trouble getting enough.
- Health & Medicine
A Sour Taste in Your Mouth
Researchers may have pinpointed how the tongue's cells detect sour tastes.
- Archaeology
Sahara cemetery
Archaeologists uncover the remains of a Stone Age settlement in the Sahara desert.
- Health & Medicine
Sun screen
Too much exposure to the sun's ultraviolet rays can damage human skin. That's why doctors recommend people who will be outdoors for long hours in the summer sun protect their skin.
-
- Humans
If only bones could speak
The shape of fossil spine bones suggests that ancient human ancestors could speak.
- Health & Medicine
Prehistoric trips to the dentist
Thousands of years ago, some people had holes drilled into their teeth.
