go to the Wellcome Library's new image bank and find your favorite scientific image.
On the old blog, I wrote a post about an X-ray Wilhelm von Röntgen took of his wife's hand and wedding ring. While hunting for that image, I came across this X-ray of a snake eating a mouse by Sir Arthur Schuster, taken in 1896. It is at least as cool, and is much more biological.
Which pictures are your favorites?
Mine is Eadward Muybridge's fantastic photo sequence of the galloping horse, which changed art forever.