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Ultraviolet radiation

A particular type of UV light, shown here with a scintillator composed of plastics, could revolutionize the practices of flu prevention.

A cure for the flu? It could be as simple as sitting under a lamp.

Health

Researchers say that when they came across their most recent discovery to prevent the flu a light bulb went off — a UV light bulb.

This image is from a video made in 2011 that compiled visualizations of the Antarctic ozone hole. Recent findings have shown that the hole is filling up — while other parts of ozone remain on the decline.

The ozone hole over the Antarctic is beginning to fill up. Here’s the bad news.

Science
A false-color image showing ozone concentrations above Antarctica on Oct. 2, 2015.

The ozone layer is bouncing back. And our hairstyles will be OK too.

Environment
Children play in a pool in front of Punta Hermosa beach, south of Lima, on Jan. 2, 2015.

Why South American parents are hiding their kids from the sun

Environment
The World

Beating the heat with new sunburn technology

Environment