Use a mathematical representation to support claims for the cycling of matter and flow of energy among organisms in an ecosystem.

  1. 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.

  2. Health & Medicine

    Beautiful nails may harbor germs

    Two students wondered why they weren’t allowed to wear fake nails as nursing assistants. They decided to use science to probe why. What they found sent them to the Intel International Science and Engineering Fair.

  3. Animals

    Kangaroos have ‘green’ farts

    The farts and belches of these animals contain less methane than do those from other big grass grazers. Microbes in their digestive tract appear to explain the ‘roos lower production of this greenhouse gas, a new study finds.

  4. Health & Medicine

    Some of chocolate’s health benefits may trace to ‘bugs’

    Dark chocolate offers people a number of health benefits. A new study finds that the breakdown of chocolate by microbes in the human gut be behind some benefits.

  5. Earth

    Intel STS finalist brings earthworms to the big time

    Earthworms and charcoal help plants resist infections, according to research by Anne Merrill, a finalist in the 2014 Intel Science Talent Search.

  6. Climate

    Watching our seas rise

  7. Animals

    Snake blood boosts mouse heart

  8. Animals

    Tiny earthworms’ big impact

  9. Animals

    An energy lesson from panda poop

  10. Environment

    Swirling seas of plastic trash