Until recently, sleep was something of a mystery to us. Scientists didn't know why we slept -- and they thought that when the body was at rest, the br...
Read Whole Story
A number of proposals and perspectives have emerged that, taken together, paint a compelling and converging picture of why sleep evolved and why it is now needed.
Are you curious -- and sometimes maybe a bit baffled -- by your dreams? Do you wake up with fragments of a dream fresh in your mind and wonder: Why did I dream that?
Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements. Learn more.