1. Ecosystems

    Making Scents of Flowers

    Science gets the tools to start sniffing around the ecology of floral scent.

  2. Paleontology

    Skimming the Surface: Flying reptile may have scooped its meals

    Fossils unearthed in Brazil strengthen the idea that some species of ancient flying reptiles snatched their meals on the fly, snapping up fish as they swooped low over the water's surface.

  3. Animals

    Redder is healthier in squawking birds

    When barn swallow nestlings open wide for food, their parents may be looking for the healthiest throats.

  4. Animals

    Why don’t racing horses fry their brains?

    Lumpy sacs bulging out of a horse's auditory tubes may solve the mystery of how such an athletic animal keeps its brain from overheating during exercise.

  5. 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.

  6. 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.

  7. Paleontology

    Fossil leaves yield extinction clues

    Analyses of fossil leaves provide more evidence that the mass extinctions that wiped out the dinosaurs 65 million years ago were sudden and probably brought about by an extraterrestrial impact.

  8. Paleontology

    Into the Gap: Fossil find stands on its own four legs

    A fossil originally misidentified as an ancient fish turns out to be the nearly intact remains of a four-limbed creature that lived during an extended period noted for its lack of fossils of land animals.

  9. 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.

  10. Paleontology

    Rain Forest Primeval? Colorado fossils show unexpected diversity

    The size, shape, and riotous variety of fossil leaves unearthed at a site in central Colorado suggest that the region may have been covered with one of the world's first tropical rain forests just 1.4 million years after the demise of the dinosaurs.

  11. 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.

  12. 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.