Mental Health

Enhancing a research monkey's life by housing it with a pal often doesn't hurt the study, says a researcher who's done it. In her own experience, she says, "it actually helped to improve the science."

"Human beings are the only species that deliberately deprive themselves of sleep for no apparent gain," says sleep scientist Matthew Walker. His new book is Why We Sleep.

Americans' stress levels rose significantly over the past year, according to the American Psychological Association. A doctor tries float therapy to see if it can help him feel less stressed out.

Finding inner calm hard to come by? Some people use their device obsession to help them disconnect. The apps aren't a quick fix, therapists say, but might help you stick to a mindfulness practice.

Neuroscientist Steve Ramirez used lasers to enter the brains of mice and edit their memories. He imagines a future where this technology might be possible in humans as well.