Uncategorized

  1. Paleontology

    Was it sudden death for the Permian period?

    The massive extinctions that came at the end of the Permian period could have occurred within a mere 8,000 years, which suggests a catastrophic cause for the die-offs.

    By
  2. Ecosystems

    Lab ecosystems show signs of evolving

    An ambitious test of group selection considers whether natural selection can act on whole ecosystems as evolutionary units.

    By
  3. Why did the turtle cross the road?

    A survey of painted turtles that perished while trying to cross a highway suggests that the freshwater species need more dry land than expected.

    By
  4. Predators shape river world top-down

    Hunting and no-hunting zones allow a rare test of the much-debated proposal that big carnivores shape their ecosystems from the top down.