Humans
- Humans
A Long Haul
A new study of stone tools suggests that ancient Polynesian sea voyagers traveled thousands of miles in their canoes.
- Health & Medicine
The buzz about caffeine
Is caffeine bad or good for you? The answer is: a little of both.
- Health & Medicine
Toxic Dirt + Avian Flu = Science Fair Success
Fifteen-year-old Nolan Kamitaki shows what it takes to become one of America's top young scientists.
- Health & Medicine
The electric brain
Electrical implants allowed a brain-damaged man to talk, eat, and move again.
- Humans
Chicken of the Sea
Chickens may have crossed the Pacific Ocean along with early Polynesian explorers.
- Health & Medicine
A big discovery about little people
Humans may have once walked the Earth with tiny people—a possible newly discovered species that scientists have nicknamed "hobbits."
- Health & Medicine
Don’t Eat That Sandwich!
If you drop a sandwich on the floor, how quickly does it pick up bacteria?
- Health & Medicine
A Better Flu Shot
A new kind of vaccine that's made in caterpillar cells prevents influenza.
- Humans
A Long Trek to Asia
An ancient skeleton from a Chinese cave shows how far humans walked when they left Africa.
- Health & Medicine
Chew for Health
Surprise your teacher: New studies show that chewing gum might be good for you!
- Humans
Earth Rocks On
Some rocks in Greenland show that Earth's crust was moving even 3.8 billion years ago.
- Health & Medicine
Wake Up, Sleepy Gene
Variation in the length of one gene affects how well you function when short of sleep.
