Happy Birthday, Thomas
Today in 1621 Thomas Willis was born - the father of modern neurology. He discovered much about the way the brain is put together - nerves and cranial anatomy, including the Circle of Willis, and the circulation of the blood into and through the brain.
Carl Zimmer has written a (typically) brilliant book, Soul Made Flesh, that tells his story - and others (did you know Christopher Wren was more famous in his lifetime for his anatomical drawings than his architecture?) - highly recommended. I happened to read it shortly before visiting London, and it made me hunt out Willis's tomb in St Paul's.