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 ...

An curved arrow pointing right. The Science of Dogs blog compared popular dog breeds from the 1915 book "Dogs of All Nations" to their current day counterparts. Produced by Emmanuel Ocbazghi ...

Bred for endurance, they can run alongside horse-drawn carriages all day ... of the majority of dog breeds is a relatively recent phenomenon, beginning with selective breeding practices during ...

All but two Adelie penguin chicks have starved to death in their east Antarctic colony, in a breeding season described as ... along the Antarctic coast, and breed from October to February They ...