You're not the only one with a strange sleep routine. In a video interview with Fortune released on Wednesday, Google DeepMind CEO Demis Hassabis said he sleeps very little and splits his waking hours into two working days. "I do try and get six, but I have unusual sleeping habits," he said, about his number of hours of sleep. "I sort of manage during the day." He said that any less sleep than that would be bad for the brain. Hassabis cofounded DeepMind in 2010, which Google acquired in 2014.