1. Animals

    Hot tail gives warning

    Ground squirrels can heat up their tails to signal and perhaps taunt rattlesnakes.

  2. Psychology

    Roller coaster thrills

    Riding roller coasters is about the need that some people have to seek thrills and take risks.

  3. Humans

    Traces of Ancient Campfires

    Researchers have unearthed traces of what may be among the oldest human-controlled fires.

  4. Health & Medicine

    Workouts: Does Stretching Help?

    Stretching before exercise or sports may not improve performance or reduce the chance of injury.

  5. Humans

    Hints of Life in Ancient Lava

    Ancient lava may contain some of the earliest traces of life on Earth.

  6. Animals

    Male baboons get mellow

    Females may get male baboons to tone down violent behavior and become more cooperative.

  7. Animals

    Snagging insects, hummingbird style

    A hummingbird has an unexpectedly flexible lower bill to help it catch bugs.

  8. Humans

    The taming of the cat

    People had pet cats at least 9,500 years ago, long before ancient Egyptians started worshipping felines.

  9. Health & Medicine

    Allergies: From bee stings to peanuts

    As more and more people develop allergies, researchers are looking for ways to treat and prevent severe allergic reactions.

  10. Animals

    Ganging up to grab more food

    Food-snitching birds may drive wolves to hunt in large packs.

  11. Animals

    Some birds heed a monkey’s warnings

    An African forest bird can tell which monkey alarm calls to pay attention to.

  12. Health & Medicine

    Moving Good Fats from Fish to Mice

    Healthful fats from fish could end up in beef, eggs, and other foods.