Science
Dolphins Have Hidden Fingers. So Do Seals. These Sea Creatures Did Not. – The New York Times
A recent analysis of the flippers of living and extinct marine animals shows the enduring power of “baby mittens.”
Other than penguins (whose ancestors evolved wings before they returned to the water), all of the living aquatic animals in the study pursued this strategy, Dr. Vlachos said. Some now-extinct creatures, such as plesiosaurs and ancient crocodiles, had fingers in their flippers as well.
The exception was ichthyosaurs thick-bodied reptiles that ruled the seas through the early Jurassic.Their ancestors also had fingers.Butover time, they connected to each other until they were less like a multibran…
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