Sleeping better helps you think better, which helps you live better. Three experts explain why quality sleep is imperative to brain function, problem solving, communication, and more.

How can the brain — a piece of matter — love? Physics and chemistry explain the material world, but they can’t explain why it feels like something to be alive. This is the mystery of consciousness, according to these experts.

In revolutionary Russia, a group of forward-thinking philosophers offered an alternative to both futurism and communism.

In this excerpt from "The Story of CO2," Peter Brennan explains how changes in the Earth's ecosystem led to fire, which in turn led our ancestors to become the "fire apes."

After more than a million years of separation, two branches of humanity reunited around 300,000 years ago, suggests new research.