03:28
Consciousness
Social psychologist Mahzarin Banaji talks about the concept of consciousness. Dr. Banaji explains that she thinks of consciousness as having four properties: awareness, control, intention and self-reflection
03:09
The Great Mystery: Circadian Rhythms
Human alertness ebbs and flows along with other brain and body processes, a direct reflection of circadian rhythms. The hormone melatonin also contributes to the control of sleep. It is secreted in the darkness and inhibited by light. People need at...