The da Vinci 'to do' list

A previously unseen page from Leonardo da Vinci's notebooks shows that even geniuses have to write down to-do lists. Naturally, the tasks on the painter, sculptor and scientist's list are a little less ordinary than walking the dog or picking up the dry cleaning. In the list, written around 1510, Leonardo reminds himself to obtain a skull, to get his books on anatomy bound, to observe the holes in the substance of the brain and describe the jaw of a crocodile.