The post by James Somers that this article references at the top inspired me to buy the David Goodsell book The Machinery of Life. I would seriously recommend that to anyone who doesn't have a background in biology (like me). The phrase is a bit of a cliché, but it genuinely blew my mind, to the extent that I had to read it slowly because there's so much fascinating stuff packed into such a small book. It's obvious to me now, but the fact that so much of this stuff is about physical shapes locking into each other, and doing it at an almost unimaginable speed, was absolutely enthralling.