Scientists in Peru recently found the oldest rodent fossils yet discovered in South America. An international team of scientists discovered the fossils in the Peruvian Amazon and believe the teeth belonged to mouse-sized animals that lived around 41 million years ago--10 million years older than previously discovered fossils. Read the entire BBC article here.

Common critters living in Peru today include the rabbit-like viscacha (pictured about at Machu Picchu), the tasty guinea pig, and the large Amazon-dwelling capybara.