Life in the World's Oceans. Episode 13, The Evolutionary History of WhalesLife in the World's Oceans. Episode 13, The Evolutionary History of Whales
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Streaming Video, 2018
Current format, Streaming Video, 2018, , Available.
Streaming Video, 2018
Current format, Streaming Video, 2018, , Available. Offered in 0 more formats
Marine mammals did not evolve from marine species. Rather, they evolved from land mammals who found a plethora of "suddenly" open ecological niches when the dinosaurs became extinct. Today's marine mammals might resemble each other because convergent evolution has led to similar adaptation. But best as scientists can tell, they have five separate lineages and no single common ancestor.
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