Life
- Animals
Hippo sweat is natural sunscreen
Hippo "sweat" contains substances that fight microbes and screen out ultraviolet light.
- Plants
Plants travel wind highways
Some plants can hitchhike along invisible freeways of wind to reach distant places.
- Animals
Prime time for cicadas
Researchers are tracking down why some types of cicadas emerge in vast numbers only once every 17 years.
- Fossils
Ancient critter caught shedding Its skin
A fossil reveals that ancient animals shed their skin, just as insects and crustaceans do today.
- Brain
Little Toys, Supersize Mistakes
Toddlers sometimes treat small objects, such as toy cars or dollhouse chairs, as if they're much larger.
- Ecosystems
Frogs get poison from ants
The skin of some frogs becomes poisonous after they eat certain kinds of ants.
- Brain
Charging up the brain for reading
Some kids can become better readers if they learn how written letters match up with speech sounds.
- Environment
Alien invasions
Around the world, plants, animals, fungi, and other life forms are ending up in places where they don't belong.
- Animals
Noisy boats may bother orcas
Whale watcher boats may be so noisy that killer whales must change their calls to be heard.
- Genetics
What makes a dog?
Analyzing dog DNA is helping to explain the origin, behavior, and diseases of dogs.
- Animals
Male baboons get mellow
Females may get male baboons to tone down violent behavior and become more cooperative.
- Animals
Snagging insects, hummingbird style
A hummingbird has an unexpectedly flexible lower bill to help it catch bugs.
