1. Animals

    Gator Feelings: Tough faces, more sensitive than ours

    Alligator and crocodile faces carry pressure receptors so responsive that they can detect ripples on the water's surface from a single falling drop.

  2. Animals

    No Tickling: Common caterpillars deploy defensive hair

    The caterpillars of the European cabbage butterfly have a chemical defense system that scientists haven't documented before.

  3. Animals

    Dogged Dieting: Low-cal canines enjoy longer life

    The first completed diet-restriction study in a large animal shows that labrador retrievers fed 25 percent less food than those allowed to eat as much as they desired tend to live longer and suffer fewer age-related diseases.

  4. Paleontology

    Ancient Whodunit: Scientists indict wee suspects in ancient deaths

    Evidence locked in 180,000-year-old sediments suggests that a toxic algae bloom was the cause of death for a large group of mammals that were fossilized intact on an ancient lake bottom.

  5. Animals

    Rebranding the Hyena

    Zoologists are hoping that long-term ecological studies of the spotted hyena will assist in dispelling the animal's undeservedly bad reputation.

  6. Animals

    Big-Eyed Birds Sing Early Songs: Dawn chorus explained

    Researchers report a strong relationship between eye size and the light intensity at which birds start to sing in the morning.

  7. Paleontology

    Older Ancestors: Primate origins age in new analysis

    A controversial new statistical model concludes that the common ancestor of primates lived 81.5 million years ago, about 16 million years earlier than many paleontologists have estimated.

  8. Animals

    Maneless lions live one guy per pride

    The male lions of Tsavo National Park don't grow manes but they're no wimps—they're the only male lions found so far that rule big prides of females alone, without help from some buddies.

  9. Animals

    Wild Hair

    The technique of studying animals through genetic analysis of their fur gained fame with a political furor over lynx, but scientists have applied the technique to many other animals.

  10. Ecosystems

    Deprived of Darkness

    From anecdotal reports of little-studied phenomena, researchers suspect that artificial night lighting disrupts the physiology and behavior of nocturnal animals.

  11. Ecosystems

    Climate Upsets: Big model predicts many new neighbors

    The biggest effects of climate change during the next 50 years may not be extinctions but major reshuffling of the species in local communities.

  12. Animals

    Toxic Tools: Frogs down under pack their own poison

    An Australian frog can synthesize its own protective poison, rather than obtain it from the insects it eats.