Multiple Causes of Woolly Mammoth Extinction

A study by Glen MacDonald, director of UCLA’s Institute of the Environment and Sustainability and a professor of Ecology and Evolutionary Biology (EEB) along with Robert Wayne and Blaire Van Valkenburgh, also EEB professors, found that woolly mammoths succumbed to a lethal combination of climate warming, encroaching humans and habitat change between 4,000 and 10,000 years ago.

Brain’s ‘clock’ less accurate with aging

Research by Gene Block, UCLA chancellor and professor of psychiatry, biobehavioral sciences and physiology, and Christopher Colwell, UCLA professor-in-residence of psychiatry and biobehavioral sciences, shows that mice, that the pattern of activity in the brain region that regulates circadian rhythms begins to decay when the animals hit middle age. This research could provide clues as to why sleep patterns change as people grow older.