Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.

  1. Oceans

    Creative ways to help coral reefs recover

    Coral reefs are under siege from threats ranging from climate change to explosives. But scientists are developing ways to rebuild reefs before they disappear.

  2. Health & Medicine

    Girls take note: Corn fiber can strengthen bones

    Two new studies show that soluble corn fiber could help women improve bone health.

  3. Brain

    Hormone affects how teens’ brains control emotions

    Using scans of brain activity, scientists show that surging hormones drive where emotions get processed in a teen’s brain.

  4. Animals

    This mammal has the world’s slowest metabolism

    A sloth species manages to exist with a super-slow metabolism by moving little and using its environment for heating and cooling its body.

  5. Brain

    Mapping word meanings in the brain

    A detailed new map shows that people comprehend words by using regions across the brain, not just in one dedicated language center.

  6. Taking science to the track

    An athlete took on science research with a few friends and a heart monitor.

  7. Animals

    Insects can patch their broken ‘bones’

    When insects suffer wounds, they can mend their ‘skeleton’ with a patch on the inside. This makes the leg strong again, new data show.

  8. Fossils

    How to tell if a T. rex is expecting

    A chemical test of tyrannosaur bone can determine whether the dino was pregnant — and therefore a female.

  9. Health & Medicine

    Explainer: What is skin?

    The body’s soft, outer armor contains three layers, each with its own important role to play.

  10. Health & Medicine

    Allergies linked to obesity and heart risks

    Children and teens with asthma, allergies or other autoimmune conditions tend to be overweight and show symptoms of heart-disease risks, a new study finds.

  11. Chemistry

    Some air pollutants seep through skin

    The skin is the body’s largest organ. And it can let in as much or more of certain air pollutants than enter through the lungs, a new study finds.

  12. Tech

    New light on brain science

    A combination of physics, biology and engineering lets scientists use light to trigger actions by specific brain cells. Called optogenetics, this technology is shining new light on how the brain works.