How cocaine, crystal meth, nicotine and caffeine affect dopamine activity. 

The big question in Ian McEwan's novel Solar. 

Scientist Rupert Sheldrake investigates if there's anything to that feeling that someone's looking at you, or dogs seeming to know when there owners are coming home.

For life - much less human life - to have emerged on Earth, a number of unlikely factors had to be in place. 

Poetry and mystery and romance associated with that round glowing rock in the sky.

Gabor Mate is a doctor and best-selling author. His totems are Gautama Buddha, Yeshua (aka Jesus), Karl Marx, Albert Einstein and Sigmund Freud. Beethoven's in there too.

Certain parts of your brain become less active, with interesting results.

What happens when you fill a room with some of the very best scientists, philosophers, sociologists, and mystics to have them ask the collective question, What does it mean to be human? Jeff Bellsey reports from the Being Human 2012 conference.

What exactly is going on in our heads when we give in to a craving?

What does it mean to actually "think"? How often do we do it?