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Fish fossils reveal how tails evolved, Penn professor finds

2016-12-05 13:00:00| LifeSciencesWorld

[NEWS] IMAGE: Aetheretmon (facing right), an early ray-finned fish, swims in a 348-million-year-old river in Foulden, Scotland. Aetheretmon exhibits the ancestral state of two distinct 'tails', fleshy tail above and caudal fin. Credit: John M…

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