Evolution

How Baby Owls Sleep (Awww!) Affects What They Look Like
The adorable offspring have some very fascinating sleep habits.
What Helped Us Evolve From Primates? Learning How to Make Our Beds
Since they have to worry less about predators, primates who sleep in tree nests achieve more deep sleep — a trait crucial to development.
The Year in Sleep: 2015’s Most Important Research
Looking back at the year's most important sleep discoveries.
Efficient Sleep Is Fundamental to Our Evolution
Let's not be so hasty to blame the Industrial Revolution for our modern sleep habits.
Homo Erectus, Come on Down!
Once early man came down from the trees and slept on the ground, they learned how to dream. And everything changed.
Why Do I Feel Like I’m Falling Right Before I Go to Sleep?
That feeling of falling right before dozing off is a harmless involuntary muscle spasm called a hypnic jerk.