A 161 million-year-old fossil, linked to a line of extinct frog-like amphibians, is the oldest tadpole ever found. By Asher Elbein The metamorphosis of a frog from baby to adult is one of nature ...

Call it a grand-phibian. Scientists have unearthed a fossil of the world’s oldest tadpole in Argentina — a shock finding that could alter our understanding of amphibian evolution, experts say.

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 ...

The fossilization of the tadpole's "delicate structures," like its eyes and gills, allowed for a detailed analysis of the rare find. When you purchase through links on our site, we may earn an ...

NEW YORK (AP) — Scientists have discovered the oldest-known fossil of a giant tadpole that wriggled around over 160 million years ago. The new fossil, found in Argentina, surpasses the previous ...