Repeated Marine Predator Evolution Tracks Changes In Ancient And Anthropocene Oceans
(Click to enlarge) Modern dolphins (pictured) and extinct marine reptiles called ichthyosaurs descended from distinct terrestrial species, but independently converged on an extremely similar fish-like body plan although they were separated in time by more than 50 million years. (Credit: Javier Medina/Flickr)
For more than 250 million years, four-limbed land animals known as tetrapods have repeatedly conquered the Earth’s oceans.
(From ScienceDaily)– These creatures–such as plesiosaurs, penguins and sea turtles–descended from separate groups of terrestrial vertebrates that convergently evolved to thrive in aquatic environments. Read the full story »