Sorry, this episode is not currently available

Why Do We Dream?

Horizon, 2008-2009 Episode 9 of 17

An investigation into the science behind dreams, using a series of cutting-edge experiments and personal stories to discover where they come from, whether they have meaning and, ultimately, why we have them. The film reveals that much of what we thought we knew no longer stands true. Dreams are not simply wild imaginings, but play a significant part in all our lives - from our memories to the ability to learn and our mental health. Most surprisingly, we find nightmares are also beneficial and may even explain the survival of our species.

55 minutes

Last on

Mon 26 Jan 2015 23:15

iWonder - why do some people get drunk more quickly than others?

iWonder - How can I avoid a hangover?


Find out which of these anti-hangover strategies could actually work

Horizon interactive ebook


Celebrate 50 years of Horizon with this free downloadable ebook for tablets.

Added. Check out your playlist Dismiss