Analyze and interpret data to provide evidence for the effects of resource availability on organisms and populations of organisms in an ecosystem.

  1. Animals

    Rare as a rhino

    Most species are rare. Some have always been rare. A problem develops when people are responsible for accelerating a species’ rarity to the point that extinction threatens.

  2. Animals

    Bugs may have made us brainy

    Finding and eating bugs when other food was scarce helped primates — including our ancestors — evolve bigger and better brains. At least that’s the conclusion of a new study in Costa Rica.

  3. Animals

    A library of tweets (and howls and grunts)

    The Macaulay Library houses a world of animal sounds. And now anyone with an Internet connection can check out this audio collection.

  4. Animals

    Free app tracks fireflies

    Scientists are worried about firefly populations. Now you can use a free app to map firefly flashes, and contribute data to tracking the health of this popular summertime bug.

  5. Science stars are on display at the White House

    One hundred students from 30 states participated in the fourth annual White House Science Fair in Washington, D.C.

  6. Plants

    Taking a long look at lichen

    Lichens may not look like much, but they play a vital role in our ecosystems. ISEF finalist Madeline Handley decided learn more about the lichens in her native Alaska.

  7. Animals

    Tiny earthworms’ big impact

    Invasive earthworms change North American landscapes, for better or worse.

  8. Oceans

    Sea changes

    Carbon dioxide is making the oceans more acidic.

  9. Environment

    Cleaning up fish farms

    Although fish farms can supply lots of food, these operations may also cause pollution and hurt wild populations.

  10. Animals

    A fallout feast for crabs

    Crabs can take advantage of hot, toxic plumes from undersea vents to feed on poisoned plankton.

  11. Animals

    Booby brothers and bullies

    Baby brown boobies can be pretty rough and tough in the nest.