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

  1. Taking science to the track

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

  2. 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.

  3. 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.

  4. Health & Medicine

    Explainer: What is skin?

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

  5. 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.

  6. 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.

  7. 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.

  8. Health & Medicine

    These bubbles treat wounds

    New research shows bubble-powered drugs can travel upstream, against the flow of blood, to seal wounds shut.

  9. Animals

    Hummingbird tongues may be tiny pumps

    Scientists had thought that hummingbird tongues work through capillary action. A new study, though, concludes they work like little pumps.

  10. Health & Medicine

    Explainer: The nico-teen brain

    Both e-cigarettes and tobacco products can release large amounts of nicotine during use. Nicotine is the chemical that makes tobacco addictive — and the teen brain is especially vulnerable to it.

  11. Health & Medicine

    Catching ZZZs may retrieve lost memories

    Forgetful? Maybe you’ve forgotten to get enough shuteye. A study in fruit flies suggests that a good sleep can boost their ability to remember things.

  12. Brain

    Scientists Say: Blood-brain barrier

    Blood can contain nasty bacteria and other things you want to keep away from your delicate brain. The blood-brain barrier is up to the job.