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Climate Change

Photograph of a small child sitting in a waiting-room chair with fists covering their face.
Health & Disease

Severe irritability in children and teens: A new understanding

Kids with disruptive mood dysregulation disorder have explosive outbursts well past toddler age. Scientists are trying to work out the causes and what treatments help.

An array of bottles of vitamin D3 in bright colors on an orange background
Health & Disease

Should you take vitamin D? Here’s the science

Some people take too much, and too many get too little. Experts explain who needs D supplements, and why.

Collage shows chemical structure of amino acids surrounding an image of various animals — including pandas, sheep, cows and an insect.
Food & Environment

How plant-eaters snag their essential amino acids

Early in evolution, we animals lost the ability to manufacture nine of the 20 building blocks needed to make proteins. Herbivores evolved an impressive array of tricks to ensure their dietary needs are met.

Photograph shows a close-up of an Aedes aegypti mosquito perched on a leaf.
Health & Disease

Beating back the Aedes aegypti mosquito

Scientists are taking a multipronged approach to tackle this dangerous carrier of dengue, yellow fever and other noxious viruses

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