The discovery in Patagonia shows that frogs have had a tadpole stage for at least 160 million years. Here’s how the ancient frogs compare to those of today. Tadpoles and adults of the extinct ...
Tadpoles have been wriggling in the world’s ponds for at least 161 million years. A newly detailed fossil finding pushes the record for earliest known tadpoles back an additional 30 million ...
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