The eye is an organ of extreme perfection. I have a strong interest in evolution, and eyes have developed stunning adaptations over time. This mayfly (above) is a male with what are called turban eyes—greatly enlarged eyes at the top of the head in the shape of a turban. The male uses his eyes to scout for the silhouette of a female in the dim light of dusk. He doesn’t even have a working mouth. If you live for only one day, as adult males usually do, you don’t need to eat. But you do need tremendous eyes to find a female before you die.

I am a cancer researcher, but I also work as a science photographer under the