In 2010, Tycho Brahe was exhumed from his grave in Prague, an event which received extensive international media coverage. Since then, a Danish-Czech team of researchers has been working to elucidate the cause of Tycho Brahe’s death. The results of this intensive work now make it possible to rule out mercury poisoning as a cause of death.

Also from the article:

In addition to his beard, another central element of the Tycho Brahe myth has been subjected to quantitative analysis: his famous artificial nose. Tycho Brahe lost part of his nose in a duel in 1566. According to tradition, the prosthetic nose he wore for the rest of his life was made of silver and gold.

[via Science Codex]

I’m reminded of this segment on Tycho from Carl Sagan’s Cosmos.