An ancient fish from the fossil record that had features between fish and land animals, showing how evolution led to creatures that could move onto land.
From Greek 'eu-' (well) + 'sthenos' (strength) + 'pteron' (wing, fin). Named descriptively for its well-developed fins.
Eusthenopteron fossils are like evolutionary time machines—their sturdy fins and lung-like breathing organs directly show how fish ancestors took their first steps toward becoming land animals 375 million years ago.
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