This is one particular frog which is thought to have been alive 25 million years ago (or 40 million years after the Age of the Dinosaurs ended). Frogs are amphibians...amphibians were around before the first reptiles. The earliest amphibians predate the appearance of frogs, but the earliest frogs are thought to date back to around 200 million years ago. At least that's what evolutionary biologists seem to think.
I don't disagree that amphibians were among the first creatures on Earth but after degrees in biology, chemistry, and graduate work in anthropology I became very skeptical of carbon dating and other age estimations.
The find is very interesting but the age will get the headlines and if people knew how shaky the whole "dating game" they would be skeptical as well.
I have witnessed the pressure on scientist to make every find "older" for the "wow!" factor. I don't claim to know how old life on earth is because it is infantile science.
"Evolutionary biologist" have their own agenda that is treated with the same academic credibility as "global warming climatologist" where the ultimate answer drives the result.
As I stated.... the find is very interesting but the age brought out the devil's advocate in me.