Very interesting lecture about sleep, healing, pain, and hormone D.
Well worth watching!  I've been watching over a few days cos it's quite long, but really interesting!!

pt 1 - http://www.youtube.com/watch?v=GHCD3fONV1k
pt 2 - http://www.youtube.com/watch?v=GwaFn7D3anY
pt 3 - http://www.youtube.com/watch?v=QFkKkLB6rpM
pt 4 - http://www.youtube.com/ ( Read more... )