HS-LS1-2
Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.
- Physics
Comb-like wings help the tiniest insects swim through ‘syrupy’ air
When you're the size of a grain of sand, flying through air is like swimming through a syrup. Bristled wings help the tiniest insects manage this.
- Plants
Unlock pinecone secrets with this science activity
Let’s find out how pinecones respond to different temperatures — by mimicking changes in weather from the comfort of our own kitchens!
- Animals
Explainer: What is a shark?
These fish have skeletons made of cartilage, not bone — and aren’t nearly as scary as portrayed in the media.
- Ecosystems
Scientists Say: Transplant
Transplant means to move something from one place to another. A transplant can involve something as small as a cell or as large as a whole population.
- Health & Medicine
Seeing sick faces revs up our immune system, new data show
It activates parts of the brain that detect threats and boosts the activity of at least one type of immune cell.
- Animals
What dogs see on TV depends on their temperament
Breed, age or sex didn’t seem to matter in how dogs reacted to TV, but personality did. That’s according to a survey of more than 400 dog owners.
- Health & Medicine
Sleeping in — but not too much — may ease anxiety
Getting up to two hours of weekend catch-up sleep lowers anxiety in teens, new research shows.
- Humans
Vacation could provide teens time to practice independence
A poll shows U.S. parents are reluctant to let teens go places alone on vacation. Giving teens more independence may help their mental health.
- Chemistry
Scientists Say: Lipid
These oily, water-repelling molecules knit together, forming the membranes that sustain life.
- Health & Medicine
This medicine could help teens quit vaping
The drug varenicline, paired with counseling and text messaging support, helped young people stop vaping in a new study.
- Physics
Here’s why your blood vessels don’t burst under pressure
Cells lining the blood vessels reorganize their inner structures to handle stressful boosts in pressure.
- Humans
After every soak, fingers wrinkle — and always the same way
Fingertip folds aren’t super swollen. Blood vessels constrict and pull skin inward, forming wrinkles.
