What's Your Average Sleep??

Have you ever wondered why are the sleeping habits so important and widely discussed. Do you know that British Prime Minister Margaret Thatcher, needed just four hours of sleep per night. Where Albert Einstein enjoyed lengthy 11-hour snoozes before returning each morning to rewriting the laws of physics. Was Einstein too lazy?
Well its not really the case, your sleep patterns depend on your ABCC9 gene as explained by team of University of Munich.