Frogs, like butterflies and salamanders, have what is called a "bi-phasic life cycle." They undergo metamorphosis to grow from their larval stage, as a non-reproductive tadpole that swims underwater, ...

A tadpole fossil, dating back over 160 million years, has been identified as the oldest ever found. Measuring an impressive 16 cm, this ancient specimen, discovered in Argentina, also forces ...

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 frog ...

A tadpole fossil found in Argentina, dating back at least 161 million years, is the oldest that has ever been discovered. The fossil was found back in January 2020, with news of the discovery ...

Have you ever wondered how city life affects animals like frogs? A new study reveals that urban Túngara frog tadpoles develop faster —but end up being smaller — than tadpoles from forests, probably ...

NEW YORK — 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 ancient ...

Eiffinger's tree frogs lay eggs in an isolated water bodies such as a gap between plant stems. Their tadpoles hold onto their poop for months to reduce risk of contaminating their small spawning areas ...

A photograph of a giant, green-and-yellow tadpole longer than a human hand turned up in an X post on Feb. 12, 2025. At the time of this reporting, the post had received more than 296,000 views. At the ...

A snapshot of wriggling toad tadpoles has earned Shane Gross the title of Wildlife Photographer of the Year. Beneath a floating canopy of lily pads in Cedar Lake, Canada, a swarm of western toad ...

Some tadpoles don’t poop for the first weeks of their lives. At least, that’s the case for Eiffinger’s tree frogs (Kurixalus eiffingeri), scientists report September 22 in Ecology. Eiffinger’s tree ...