Australia and South America weren't always so separate. At one time, many millions of years ago, these two continents were connected, along with others, in the southern supercontinent of Gondwana.

ANGELS CAMP, Calif. — Every May, they come. Thousands of slimy little athletes, primed for the biggest event of their careers, the World Series of competitive frog jumping: the Calaveras County Fair ...

Learn more about the lineages of Australian and South American tree frogs, which separated approximately 55 million years ago at the latest, according to a new analysis of fossils. Sam Walters is the ...