Evolution explains why brainy animals need more sleep
19th June 2008
WHY BRAINY ANIMALS NEED MORE REM SLEEP AFTER ALL
Biologists have struggled to find any satisfactory explanation for the bewildering variation in how much different mammals sleep. However, new studies that take evolutionary relatedness into account promise to revolutionize the field. New Scientist, 6/19.
http://www.newscientist.com/article/dn14164-why-brainy-animals-need-more-rem-sleep-after-all.html