1. Animals

    Altruistic Sperm: Mouse gametes team up to power one winner

    The sperm of wood mice hook together by the thousands to form high-speed teams racing toward an egg, even though only one of the pack will get the prize.

  2. Animals

    Pesticides Mess with Immunity: Double whammy promotes frog deformities

    Agricultural pollutants may conspire with parasites to cause the epidemic of limb deformity that's sweeping through North America's frog populations.

  3. Animals

    Wasp Painting: Do insects know each other’s faces?

    A researcher who dabbed tiny stripes on the faces and abdomens of paper wasps says that she's found the first evidence that the insects can recognize individuals by their markings.

  4. Animals

    Butterfly ears suggest a bat influence

    Researchers have found the first bat-detecting ear in a butterfly and suggest that the threat of bats triggered the evolution of some moths into butterflies.

  5. Animals

    Oops. Woodpecker raps were actually gunshots

    The knock-knock noises recorded last winter that raised hopes for rediscovering the long-lost ivory-billed woodpecker in Louisiana turn out to have been gunshots instead of bird noises.

  6. Animals

    Who’s on first with hummingbird bills

    A survey of 166 hummingbird species links sex differences in bill length to sex differences in plumage and to breeding behavior.

  7. Animals

    Marine Mules: Near-sterile hyrids boost coral diversity

    Reef corals that spawn in great mixed-up soups of many species may be maintaining their diversity because their hybrids are sterile mules.

  8. Animals

    Bay leaves may make rat nests nicer

    Wood rats may be fumigating their nests with bits of California bay leaves, sprigs that killed flea larvae in lab tests.

  9. Animals

    Male bats primp daily for odor display

    For the first time, scientists have described the daily routine of male sac-winged bats gathering to freshen the odor pouches on their wings.

  10. Animals

    Sniff . . . Pow! Wasps use chemicals to start ant brawls

    Wasps sneak around in ant colonies thanks to chemicals that send the ants into a distracting frenzy of fighting among themselves.

  11. Animals

    Walking sticks mimic two leafy looks and split their species

    A species of walking stick may be evolving into two species by adapting to different environments.

  12. Animals

    Mole-rats: Kissing but not quite cousins

    Damaraland mole-rats live underground in rodent versions of bee hives, but a genetic analysis of these colonies finds that kinship isn't very beelike.