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Fish with Fingers | PBS LearningMedia

Fish with Fingers | PBS LearningMedia

Paleontologist Jenny Clack thought the textbook story of tetrapod evolution was implausible: How could fishlike creatures, stranded on land, somehow evolve limbs and survive to become the first tetrapods? The search for an answer took her to Greenland, where she found one of the earliest known tetrapods, called Acanthostega. With its fishlike ...

pbslearningmedia.org2009年1月1日

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