The perfect human body has the legs of an ostrich, the heart of a dog, and the eyes of an octopus, according to anatomist Alice Roberts. And it’s utterly terrifying.

They are far more sensitive to light than cone cells, which is why you can sometimes see stars out of the corner of your eye at night, but when you look straight at them they seem to disappear. 5.

To approach a question 400 million years in the making, researchers turned to mudskippers, blinking fish that live partially out of water. A magnified view of the human eye shows the pupil, the ...