lunedì 3 marzo 2014

NYT Science: Trilobites: Variations on a Theme

Trilobites: Variations on a Theme
By

Over 300 million years, trilobites evolved a diverse and successful array of forms while maintaining a simple, common body plan.

Published: March 4, 2014 at 5:00AM

via NYT Science http://ift.tt/1fD4ZAI