Today is the anniversary of the death of Alexander the Great in 323 B.C.
(See This Day in History.)
What killed him is still open to debate. An article claiming Alexander the Great could have died of West Nile Virus looks at the type of evidence most historians would overlook, including the fact that there is a swamp near where Alexander died that could have been the breeding grounds for insect-borne diseases. In The Death of Alexander the Great, Paul Doherty looks very carefully at the historical evidence and then concludes that Alexander died from arsenic poisoning.