Sustained Fast Rates of Evolution Explain Exactly How Tetrapods Advanced From Fish
The aerial scene depicts two Late Devonian early tetrapods – Ichthyostega and Acanthostega – coming out of the water to move on land. Footprints trail behind the animals to show a sense of movement. Credit: Davide Bonadonna One of the most critical questions in evolution is how and when significant groups of animals first evolved....