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Hunger exists on a spectrum. On the one end is food insecurity, where people are forced to adjust to fewer meals. As food becomes scarce, the body consumes its own reserves. The journey from hunger to ...

A newly developed bionic knee could help people with above-the-knee amputations walk and climb with greater ease than they could with a traditional prosthesis. The new prosthesis, described July 10 in ...

Scientists are learning how the brain knows what’s happening throughout the body, and how that process might go awry in some psychiatric disorders. By Carl Zimmer Last year, Ardem Patapoutian got a ...