by Maisie Allison

Researchers offer yet another theory to explain the composer's mysterious death at 35: 

A new monograph suggests that Mozart died from too little sunlight…[The researchers] explain: "Mozart did much of his composing at night, so would have slept during much of the day. At the latitude of Vienna, 48º N, it is impossible to make vitamin D from solar ultraviolet-B irradiance for about six months of the year. Mozart died on 5 December, 1791, two to three months into the vitamin D winter."

(Photo: A portrait of Austrian composer Wolfgang Amadeus Mozart by painter Johann Georg Edlinger, showing the composer not long before his death, hangs at the Gemaeldegalerie in Berlin, Germany. By Sean Gallup/Getty Images)