There are places where frogs could be — but aren't. And places where frogs could be — and are. Ninety years ago, scientists were debating the question of animal dispersal. How come there are kangaroos ...

The world's smallest known vertebrate is a frog the size of a housefly, a new study says. Scientists locate the teensy animals by listening for their calls and trying to zero in on the sources of the ...

A frog with a sticky—and sharp—tongue, and a friendly fly are a dynamic comedic team in six brief, silly episodes perfect for beginning readers. Tricky Frog usually gets the upper hand, ending up with ...

There are places where frogs could be — but aren't. Ninety years ago, scientists were debating the question of animal dispersal. How come there are kangaroos in Australia, and none in southern Africa ...

There are places where frogs could be — but aren't. And places where frogs could be — and are. Scientists in the 1930s hadn't yet come up with the notion of plate tectonics (that continents break up ...

Ninety years ago, scientists were debating the question of animal dispersal. How come there are kangaroos in Australia, and none in southern Africa --which seems, environmentally, very ...

Ninety years ago, scientists were debating the question of animal dispersal. How come there are kangaroos in Australia, and none in southern Africa --which seems, environmentally, very ...