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 studying the ...

Scuttling among these giant reptiles was a palm-sized forebearer of modern frogs and toads. Unlike other ancient amphibians in the swamp, this critter’s upper jaw lacked teeth, making it one of ...