Imagine Earth 500 million years ago: the continents are barren rock and sand, scoured by UV radiation, with no soil, no shade, no roots to hold the ground. All photosynthetic life is confined to water. Then, over hundreds of millions of years, plants invented their way onto land — evolving cuticles, stomata, vascular tissue, roots, seeds, and finally flowers. Each innovation unlocked new habitats, reshaped the atmosphere, built soils, and created the ecosystems that every land animal — including us — depends on.

This is not the story of five separate plant groups. It is one grand narrative: the longest, most consequential colonization in Earth's history.

Hover over each era to explore the key evolutionary events. Time flows from left (oldest) to right (most recent).