420 million years ago, the forest floor of what's now New York was covered with a plant that didn’t look like a tree at all, except its roots were made of wood. Instead of looking up to learn about the evolution of trees, it turns out...

This series of videos explores the fascinating characteristics of nonvascular land plants as well as some of the simpler vascular plants. An in-depth look at mosses, hornworts, and liverworts serves as the topic of study for the...