Humans
- Science & Society
Heartbeat can affect racial perception of threat
Links between nerves in the heart and the brain shed light on why some police may be more likely to shoot an unarmed person who’s black than one who is white.
- Environment
Heart risks seen in regular vapers
New symptoms show up in regular e-cigarette users. They suggest vapers are putting themselves at elevated risk of heart disease
- Health & Medicine
Cleaner water helps male fish again look and act like guys
Water pollution can give male fish female traits — such as the ability to make eggs. And that’s not a good thing. Better water treatment may prevent that, data now show.
- Health & Medicine
Bullying hurts — but peer support really helps
Bullied kids face more mental illness as adults, new studies find. Other research suggests support from other kids can lessen the impacts.
- Tech
Magnets may one day cull deadly germs from blood
A new technique for slowing the deadly condition called sepsis would use tiny iron particles and magnets.
- Brain
Stuttering: Blood flow in the brain may play a role
A new study shows people who stutter have less blood flow to a language center in the brain known as Broca’s area.
- Health & Medicine
Scientists Say: Frostbite
As we get cold, the blood vessels near our skin constrict to keep body heat in. But in the process, they leave some tissues in danger of frostbite.
- Health & Medicine
Violence spreads like a virus
New research shows that the friends of violent teens are much more likely to become violent themselves.
- Health & Medicine
Scientists Say: Hypothermia
Our bodies need to stay warm to function correctly. If our temperature drops too much, we can suffer from hypothermia.
- Archaeology
Cool Jobs: Hunting surprises in thinning glaciers
Meet three scientists who are tracking the meltdown of Earth’s glaciers. They share their adventures, predictions and unexpected discoveries.
- Animals
How birds know what not to tweet
How do birds perfect their pitches? The chemical dopamine spikes when they sing right, and dips when they drop a note, new data show.
- Brain
Explainer: What is dopamine?
Dopamine is a chemical messenger that carries signals between brain cells. It also gets blamed for addiction. And a shortage of it gets blamed for symptoms of diseases such as Parkinson’s.
