Sunday, August 25, 2013

Where Did Dogs Come From?

In the space of just a few thousand years, dogs have changed their shape and behaviors to fit into almost every known human environment and endeavor, from Huskies pulling sleds in the Arctic to Border Collies herding sheep in Scotland and Pekinese warming laps in midtown Manhattan.

"Dogs may well display the greatest range of shapes of any mammal that has ever existed," note biologists Raymond and Lorna Coppinger. "As reproductive adults, they may have a greater range of sizes and shapes than any vertebrate species that ever lived."

And yet, at the molecular level not much has changed since dogs branched off from the family of wolves. The DNA makeup of wolves and dogs is almost identical.

Continued at... Where Did Dogs Come From?