Every dog you see today was directly or indirectly sculpted by human hands. Hard to believe? Check out Episode 2, Season 1 of Cosmos: A Space Odyssey! The first 10-15 minutes explains how we directly impacted the evolution of wolves to become modernized dogs, the very ones we love and house in our homes, through a process called artificial selection (the opposite of natural selection). It’s pretty fascinating!
In case you’re short on time, here’s a summary of what the show covers. It begins in the Stone Age, when humans were considered cavemen and the only dogs that existed were wolves. Survival was the aim over anything else at this point in time for all animals. Due to natural variations in wolves at the time, some were born with less stress hormone, cortisol, and as a result, were not frightened by humans like the rest of the pack. READ MORE