- Health & Medicine
Explainer: The teenage body clock
Around puberty, a change in the body clock of adolescents and teens makes it hard for them to fall asleep as early as they used to.
- Tech
Sniffing for cancer
New surgical tool offers surgeons speedier diagnosis of tissues that are cancerous.
- Health & Medicine
Cool Jobs: Sports science
From soccer teams to the balance beam, scientists help athletes perform their best.
- Health & Medicine
Explainer: What should I know about HIV and AIDS?
Here are some common myths and some less common facts.
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- Life
Explainer: What is a stem cell?
Special cells have ability to turn into several different types
- Health & Medicine
Fat becomes a disease
Medical group decides it is time for doctors to view — and treat — obesity as a disease.
- Health & Medicine
Infection time
Disease is more severe when it hits in the morning, at least in mice.
- Brain
Explainer: Our bodies’ internal clocks
Biological clocks determine hunger, sleepiness and other daily rhythms.
- Health & Medicine
Flu in the air
Germs tiny enough to pass through surgical masks may cause half of all cases.
- Health & Medicine
An itch switch
Scientists identify a chemical that helps the brain know where to scratch.
