Health

How does the body clock keep track of time?

Picture the scene: you wake up in the dim light of the morning, and wonder if it's already time to get up. Just as you reach for your bedside clock, your morning alarm goes off. It's a handy—if mysterious—skill. But how ...

Biomedical technology

New wearable sensor detects even more compounds in human sweat

If you have ever had your blood drawn, whether to check your cholesterol, kidney function, hormone levels, blood sugar, or as part of a general checkup, you might have wondered why there is not an easier, less painful way.

Health

On nutrition: Questions about incomplete proteins

Reader Ann F. writes: "I remember learning a bit about incomplete proteins a long time ago, and that if you combined, say, beans with corn, you had a complete protein, much as if you'd eaten eggs, or meat, or cottage cheese. ...

Biomedical technology

Modeling a devastating childhood disease on a chip

Millions of children in low- and middle-income nations suffer from environmental enteric dysfunction (EED), a chronic inflammatory disease of the intestine that is the second leading cause of death in children under five ...

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