Eight-time presidential candidate and noted conspiracy theorist Lyndon LaRouche has died. What makes a conspiracy theory? Also, can paranoia be good for us?

Intelligence was traditionally considered to be fixed. But the latest research on brain plasticity challenges this notion.

The field of psychology is seeing more robust research techniques than before, with focus on positive psychology. What led to these changes?

For centuries, the bubonic plague was thought to be the prime cause of the Black Death. What do the modern studies say about this?

Pixar's new film "Soul" is light and approachable, despite weighty themes. It raises questions about the identity of oneself.