Sleepless over Seattle: Migrating songbirds forgo sleep but keep their wits
Every spring and fall, billions of songbirds migrate thousands of miles. Most fly by night, yet are active during the day as well, raising the question of how they cope with little sleep. A new study, published online in the open-access journal PLoS Biology, suggests such nocturnally migrating songbirds simply skimp on sleep--but without the disastrous effects of sleep-deprivation seen in other a....Discovery of a new species of fossil animal 260 million years old,.which reinforces South Africa as the place of origin of all mammals,.will be announced tomorrow by scientists at the University of the.Witwatersrand.. .Professor Bruce Rubidge, Director of the Bernard Price Institute for.Palaeontological Research at Wits, and visiting Canadian researcher Dr.Sean Modesto, headed a team that found...