The fossilized remains of a canine found in the 1970s in southern Siberia's Altay Mountains (see map) is the earliest well-preserved pet dog, new research shows.

Dogs—the oldest domesticated animals—are common in the fossil record up to 14,000 years ago. But specimens from before about 26,500 years ago are very rare. This is likely due to the onset of the last glacial maximum, when the ice sheets are at their farthest extent during an ice age.

With such a sparse historical record, scientists have been mostly in the dark as to how and when wolves evolved into dogs, a process that could have happened in about 50 to a hundred years.

"That's why our find is