This learning, teaching, and reading book showcases the diversity of life on our planet. It is a textbook of the scientific discipline of geobotany, founded by Alexander von Humboldt, which seeks to explore and understand all global habitats. The book addresses fundamental questions of geobotany and plant geography: Why is there such a vast diversity of habitats on Earth, and how did it come to be? What did the world look like in past geological epochs, and what role does humanity play in its environment?.