A new study found that primeval rodents, which were estimated to be the size of bison, were closer to modern-day ponies. By Jack Tamisiea Modern rodents range in size from pygmy mice weighing less ...

It would be an exterminator’s worst nightmare: A 1,545-pound rodent with a voracious appetite and big teeth. Resembling a guinea pig grown to the size of a buffalo, the animal lived millions of years ...

It's one thing to get a goldfish because your daughter begs for one. It's quite another to end up with a hundred-pound rodent who has more than 2,700 Twitter followers. Caplin Rous is a capybara.

Fittingly for a movie borrowing its title from the 1987 fairy tale comedy "The Princess Bride," the nutria documentary "Rodents of Unusual Size" starts with a once-upon-a-time. Whether it concludes ...

"Rodents of Unusual Size" takes its name from the giant killer ratlike creatures depicted in the fairy tale "The Princess Bride." But the documentary depicts real 20-pound-plus rodents, called nutria, ...