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Evolutionary Flop: Early 4-Footed Land Animal Was No Walker?
3-D model suggests dog-size animal's hind limbs were largely useless on land.
An artist's rendering turns Ichthyostega's skin translucent to show fossils scanned for a new study.
One of Earth's earliest four-footed land animals couldn't walk, a new 3-D model suggests.
Instead, the dog-size Ichthyostega likely flopped on land, using only two of its four stubby legs for locomotion.
One of our most distant ancestors, Ichthyostega is also one of the earliest tetrapods known to have crept onto land.
Evolutionary Flop: Early 4-Footed Land Animal Was No Walker?
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