Scientists also studied eggs from the frogs to learn about the development of fertilized eggs into embryos.

VOA: special.2010.06.29

and Smiley and the other man touched the frogs.

VOA: special.2009.08.29

Obviously this opens up the possibility of enhancing our understanding of many of those diseases by studying disease models in frogs."

VOA: special.2010.06.29

He says they are part of the genome of the last common ancestor of all birds,frogs, dinosaurs and mammals.

VOA: special.2010.06.29

Tropicalis is among the smaller frogs in the Xenopus group.

VOA: special.2010.06.29