Newborn Dolphins, Killer Whales Never Sleep -Study
Sleep-deprived mothers of newborn babies should spare a thought for bottlenose dolphins and killer whales. A study has shown, Wednesday, June 29, 2005, the young of those two species do not sleep at all during the first month of life. They are active 24 hours a day -- and their mothers have learned to cope. "Somehow these seafaring mammals have found a way to cope with sleep deprivation, facilitating rather than hindering a crucial phase of development for their offspring,", a neuroscientist said.