These 400-million-year-old structures may belong to a completely extinct branch of life. Prototaxites in an Early Devonian landscape, approximately 400 million years ago. Painting by Mary Parrish, ...

Learn about the time period that took place 416 to 359 million years ago. 4 min read When the Devonian period dawned about 416 million years ago the planet was changing its appearance. The great ...