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Early life on land resembled cryptogamic ground covers like this lava field in Iceland. Researcher Silvia Pressel, co-author of a new paper on plant evolution, appears in the right of the picture. | Paul Kenrick
Climate

Terrestrial Plants Emerged 100 Million Years Earlier Than Thought

New research suggests the middle Cambrian Period, once thought to lack plant life, was very green and much like modern-day Iceland.

Moss, a living representative of one of the earliest emerging land plant lineages | PNAS
Liverwort | PNAS
Rhynia gwynne-vaughanii, a 400 million-year-old fossil plant stem from Aberdeenshire, Scotland | The Natural History Museum, London