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’s ...

Long before winter seals the forest under ice, certain frogs begin preparing for a transformation that defies basic biology.

Tadpoles are to frogs as oranges are to apples. They are so very different, University of Cincinnati Professor Daniel Buchholz said. In his biology lab, he and his students are using a National ...

The Nature Index 2024 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...