His work laid the foundations for nineteenth-century pathoanatomy, and helps explain why, within a few decades, Cullen and his colleagues had gone the way of Galen.

No, said Heidi. Not that way. That was me, trying to be different. He was as undifferent as you can get, but he was somebody else's undifferent. I just had this feeling that I could step into somebody else's shoes. […]

He's also quite jinky off his feet. He steps through tackles and offloads there are no frills. He brings other players into the game.

Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus.[…]A photo processing technique called focus stacking has changed that. Developed as a tool to electronically combine the sharpest bits of multiple digital images, focus stacking is a boon to biologists seeking full focus on a micron scale.