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.

“It's not only the oldest tadpole known, but also the most exquisitely preserved,” said study author Mariana Chuliver, a biologist at Buenos Aires’ Maimonides University. Researchers know frogs were ...

The researchers believe that N. degiustoi likely reached its giant size—which rivaled that of most anurans alive during the age of reptiles (251.9–66.0 million years ago)—as a result of having a long ...

The oldest recorded fossils of adult frogs date back to around 217 million years ago, in the Late Triassic Period, but the oldest preserved tadpoles had been from roughly 140 million years ago ...

At more than 160 million years old, a recently discovered amphibian fossil has set a new record for the earliest known ...

A sixteen-centimeter (6-inch) tadpole fossil intrigues scientists. Discovered in Patagonia, it could well redefine our ...

Scientists have discovered the oldest-known fossil of a tadpole, which lived among the Jurassic dinosaurs 160 million years ...

Fossils of the ancient frog Notobatrachus degiustoi push the known tadpole timeline back more than 30 million years.

By scientifically reuniting the adult and child, researchers were able to shed light on when frogs evolved to begin as tadpoles. While researchers have stated that most frogs didn’t have a ...

A search for dinosaur fossils unintentionally shifted into a discovery of the oldest tadpole ever discovered when a team ...

More than that, this tadpole was long enough to fit in your typical hot dog bun. The find, which relates to a close relative of our contemporary frogs, was described Wednesday in the journal Nature.

Researchers know frogs were hopping around as far back as 217 million years ago. But exactly how and when they evolved to begin as tadpoles remains unclear. The oldest-known tadpole fossil found ...