We can find all kinds of leaves on our planet. Just think of tiny pine needles, fern fronds, ivy vines, or a big banana leaf.

My friend Eric Roalson is a professor at Washington State University who is very curious about plants. He said there are a few things that give leaves their shapes.

The shape of a leaf can depend on the family history of a plant, the group it belongs to, and the environment where it grows up.