The Brain with David Eagleman

Episode 2 | Nuns and the Aging Brain

Clip: Episode 2 | 3m 37s

A study of nuns’ brains produces an unexpected revelation. A third of the brains tested at autopsy showed signs of Alzheimer’s but cognitive tests had revealed that the brain owners had shown no symptoms of this terrible disease. What was going on?

Aired: 10/21/15

Rating: TV-PG

The full episode is no longer available for online streaming. Why?

Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.

Problems Playing Video? | Closed Captioning

Explore the Brain with this Interactive

For the Classroom

Explore the Brain with this Interactive

What's the story of one of our body's most complex organs? In this interactive, viewers can explore clips from each of the six episodes of The Brain with David Eagleman. Grades: 9-13+

Learn More