Health & Fitness | Sleep

How Sleep Changes Your Brain, From Infancy to Old Age, According to Science

Neuroscience reveals many ways sleep changes our brain, from neuron growth to white matter density and the developmental dangers of jet lag.

Health & Fitness | Health

Pictures of Body and Brain Changes When You Sleep

Sleep is a mystery to many of us, but scientists know quite a bit about how it affects us. Here’s what happens to your body when you fall asleep.