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 ...

Neighborhood parks add so much to a city’s quality of life that Colorado Springs boasts 136 and there is a backlog of dozens on blueprints that will take years to be built. These three- to five-acre ...

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 ...

Two Harvard professors. One on a rooftop with a bucket of frogs. The other in the front yard, down below. Ready? Get set. Throw! There are places where frogs could be — but aren't. And places where ...

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 ...