HS-LS2-4

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

  1. Animals

    Snake blood boosts mouse heart

    Scientists find that a mouse’s heart swells in the presence of python blood.

    By Stephen Ornes
  2. Animals

    Tiny earthworms’ big impact

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

    By Cecile LeBlanc
  3. Animals

    An energy lesson from panda poop

    Scientists say microbes in panda feces may help convert grasses into fuel.

    By Stephen Ornes
  4. Environment

    Swirling seas of plastic trash

    Long-lasting oceanic garbage threatens marine life.

    By Amanda Rose Martinez
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