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Health & Medicine

Explainer: What should I know about HIV and AIDS?

Here are some common myths and some less common facts.

Animals

Dolphins name themselves

They also answer to those chosen ‘names’

Fossils

Tar pit bones yield climate clues

During the last ice age, more than 12,000 years ago, many unusual creatures wandered Southern California. Some got trapped in tar pits there. Now, their preserved remains are providing scientists with clues about summer weather during that bygone era.

Animals

Animals under Antarctic ice?

Data suggest a web of lake organisms might thrive deep under ice; scientists struggle to make sense of the new report.

Physics

Going against the flow

Tea leaves and other particles can sometimes float upstream.

Tech

Perfect reflections

Physicists have built a mirror that Snow White’s wicked stepmother would certainly not appreciate. It offers a perfect reflection.

Microbes

Some dirt won’t hurt

It could even lower risks of serious allergic disease.

Environment

Home, plastic home

Some ocean life is moving into floating piles of plastic trash.

Brain

Respecting the body’s clocks

Daily rhythms affect everything from the time we wake to how well we perform in sports.