Galen never dissected a human body — his knowledge about human anatomy came mainly from investigations of the Barbary ape. Galen's predecessors had found empty arteries and an empty left side of ...

The mere mention of Leonardo da Vinci evokes genius. We know him as a polymath whose interests spanned astronomy, geology, ...

Vesalius noticed that Galen had made some incorrect assumptions about the human body, as Galen had been unable to dissect human corpses. Galen had based his ideas about the human body on his ...