Pampered pooches have kept us humans company for thousands of years, but man’s best friends haven’t always looked like they do today.
Dogs have been our furry companions for thousands of years, but they didn't always look the way they do today. Many well-known breeds have changed a lot physically in the last century, largely thanks to humans.
By identifying specific traits — such as size, coat color, and demeanor — and allowing only those animals to mate, humans have created at least 167 different "breeds," or groups of dogs with unique physical and mental characteristics. Still, they're all part of the same species.
The Science of Dogs blog put together a side-by-side comparison of several popular breeds from the 1915 book "Dogs of All Nations" by Walter Esplin Mason, showing what they look like today.
Here’s a look at how some of your favorite dog breeds have changed over the last 100 years.