Wolfgang Amadeus Mozart died at the end of the 18th century at the ripe age of 35. Many possible causes of his death have been suggested throughout the centuries including murder by poisoning, accidental mercury poisoning or even the ingestion of a parasite from poorly prepared meat.
A recent study in the academic journal Science has found that one percent of people who sleep fewer than the traditionally-recommended quota of eight hours per night really do only need six hours of shut-eye to feel rested and energetic the next day. According to a group of Swiss researchers, this one percent of people has a mutation of the gene DEC2, which allows them to sleep just enough to get by without the sleep deprivation-induced lethargy and other side effects that others may experience from receiving too few hours of sleep.
