4. Design Your Tree Now it's time to start making your tree shape. Looking at the placement of your sticky notes, use a pencil to carefully sketch a trunk and branches.

It described the way he thought that trees branch. Though it was a brilliant insight that helped him to draw realistic landscapes, Leonardo’s rule breaks down for many types of trees.

There is a scientific picture waiting to be drawn. Someone has to do artistic justice to the evolutionary tree of life. Back in 1837, Charles Darwin sketched out a tree of life in a notebook as a ...