the so-called "devil frog," may be the largest frog that ever lived. These beach-ball-size amphibians, now extinct, grew to 16 inches (41 centimeters) in length and weighed about 10 pounds (4.5 ...

The Jambato harlequin frog has been teetering on the edge of extinction for decades. Here’s a ... [+] close-up look at this impressive amphibian–as well as two of its extinct relatives.