When the Earth Was Green

Fossils plants allow us to touch the lost worlds from billions of years of evolutionary backstory. Each petrified leaf and root show us that dinosaurs, saber-toothed cats, and even humans would not exist without the evolutionary efforts of their leafy counterparts. 'When the Earth Was Green' brings readers back in time to prehistoric seas, swamps, forests and savannas where critical moments in plant evolution unfolded.