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Explained

A photo shows a baby fitted with electronic sensors on its head meant to measure brain waves as part of a study on language.
The Mind

Out of the mouth of babes

Learning a language is child’s play, but linguists are still trying to understand how children do it so easily

An illustration conveys the idea that with age, immune cells may fade in power.
Health & Disease

An old problem: How immune responses weaken with age

The body’s defenses lose flexibility and diversity over time, and protective responses to vaccines weaken as well. Scientists are working on ways to boost seniors’ protections against influenza, the novel coronavirus and other pathogens.

A microscope image of a zebrafish embryo positioned horizontally, with individual cells labelled different colors.
Living World

The single-cell life

Three ways that studying cells individually — instead of by the thousands — is revolutionizing our understanding of biology

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