PZ Macrabbit has already mentioned this, but I thought I’d pile on: it’s a Javascript utility that shows you how Darwin edited the six editions of the Origin over the course of his life, by Ben Fry, who lets you download the program Processing (now that’s a name!) for free.
Also, the Wellcome Institute has a nice visualisation of the tree of life. A more technical one is here.
Oh, and then there’s this:
The huddled masses you see weeping to themselves outside the Welcome Trust are the mycologists and botanists, who are feeling rather ignored. What’s so interesting about these latecomer animals finally dragging themselves onto dry land, eh?
Fuggedabout youse guys. What abart the bacteriologists, I hear you cry?
They at least get a couple of name checks.
Fur and feathers, my man, fur and feathers…