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logo 11/27/2024 1:28:57 PM     
How ribs might have been vital in the evolution of walking 
By Evrim Yazgin CA Source: cosmosmagazine 4/7/2024
Evrim Yazgin
An analysis of a fossil found 20 years ago has revealed new details which might explain how vertebrates evolved to walk on land nearly 400 million years ago.
 

Tiktaalik, a 375-million-year-old fish, discovered in Canada, is a “fishapod” – a missing link between fish and the first four-legged tetrapods to walk the Earth. All land animals with a backbone (and those which evolved to be water dwellers again, like whales) can trace their ancestry back to pioneering fish like Tiktaalik – from dinosaurs, frogs and birds to humans.

 
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