The fossil of a jaw bone could prove that domesticated dogs lived in Central America as far back as 12,000 years ago, according to a study by Latin American scientists, reports AFP.
The dogs, and their masters, potentially lived alongside giant animals, researchers say. A 1978 dig in Nacaome, northeast Costa Rica, found bone remains from the Late Pleistocene. Excavations began in the 1990s and produced the remains of a giant horse, Equus sp, a glyptodon (a large armadillo), a mastodon (an ancestor of the modern elephant) and a piece of jaw from what was originally thought to be a coyote skull.
"When we started looking at the bone fragments, we started to see characteristics that could have been from a dog.