BBC Horizon: Why do we sleep?

[Mr.Smith]

im not sure if this has been posted before. ive had a look and couldnt see it.

BBC Horizon programme, lightly touching on all aspects of sleep

http://www.youtube.com/watch?v=zPce10ymTxQ

those interested in lucid dreaming will find episode 6 quite informative

 

[Caduceus Mercurius]

I thought we had already discussed this one, but it was Why do we dream? instead of 'Why do we sleep?'

Or are they the same?

Regardless, I haven't seen it yet, so thanks for posting!