An illustrative transverse plane through a small cladoxylopsid trunk, showing the three naturally-fractured parts. | Xu and Berry, 2017
Earth

The World’s First Trees Were More Structurally Complex Than Trees Today

A 374-million-year-old fossil reveals that the earliest trees on Earth lacked the internal rings that we've come to see as the signature feature of trees.

Published On 10/23/2017
9:43 PM EDT