HS-LS1-2

Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.

  1. 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.

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  2. Health & Medicine

    Teen finds the ‘shape’ of our beating hearts

    Kevin Lee used math to probe how the shape of a beating heart relates to electrical signals from the brain. He unveiled it at the 2014 Intel Science Talent Search.

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  3. Health & Medicine

    Simple test for cancer and heart disease

    Disease diagnosis often requires expensive equipment and tests to probe deep inside the body. But a new test relies on a fast, cheap and easy technique. And its answers appear on a strip of paper — just as they do on a pregnancy test.

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  4. Animals

    Dissecting the dog paddle

    Scientists occasionally describe the dog paddle as a “trot,” but that’s not right. When dogs swim, their complicated leg motions look more like a frantic run.

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  5. Life

    Explainer: What is a stem cell?

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  6. Brain

    Explainer: Our bodies’ internal clocks

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  7. Health & Medicine

    Blood does a body good

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  8. Animals

    Dolphin dimples detect electricity

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  9. Animals

    Secrets of the world’s extreme divers

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  10. Health & Medicine

    Fat weighs heavy on the brain

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  11. Animals

    Eating can be skin deep

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  12. Life

    Full-body taste

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