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

  1. Tech

    This power source is shockingly eel-like

    The electric eel’s powerful electric charge inspired this new squishy, water-based new approach to generating power.

  2. Health & Medicine

    Obesity makes taste buds disappear — in mice, anyway

    Mice that gained excessive weight on a high-fat diet also lost one in four taste buds.

  3. Health & Medicine

    Explainer: What is a concussion?

    A concussion is a severe type of head injury that can damage a brain for weeks to years — perhaps even a lifetime.

  4. Health & Medicine

    Explainer: What is a hormone?

    Various tissues secrete special chemicals, known as hormones. They travel, usually in blood, to a particular distant site where they tell certain cells it’s time to go to work.

  5. Health & Medicine

    Hunting the mysterious source of a global illness

    Doctors and scientists around the world are scouring the environment for the elusive cause of Kawasaki disease, a harmful childhood illness.

  6. Brain

    Adolescents are brain-dense — and that’s good

    Gray matter is densely packed in adolescents, brain researchers now find. This may explain how developing adults cope with decreasing gray matter volume.

  7. Plants

    Scientists Say: Guttation

    When water vapor can’t escape a plant, it might force its way out through a process called guttation.

  8. Tech

    Auto-focus eyeglasses rely on liquid lenses

    Engineers have designed what could be the last eyeglasses anyone would need. Right now, they’re bulky but smart. Liquid lenses are key to their adjustability — and those lenses focus automatically.

  9. Animals

    Frog’s gift of grab comes from saliva and squishy tissue

    What puts the grip in a frog’s high-speed strike? Quick-change saliva and a super-soft tongue, scientists find.

  10. Animals

    Cool Jobs: Abuzz for bees

    These scientists are keeping bees healthy, making medicines for people from honey and constructing bee-inspired robots.

  11. Tech

    Wired and weird: Meet the cyborg plants

    By mixing electronics with greenery, engineers have made plants that conduct electricity, detect bombs and send email.

  12. Animals

    Scientists Say: Hibernation

    Hibernation is more than a deep sleep. Animals that hibernate lower their body temperature and reduce their body activities for months.