Bipeds

Unlike most mammals, humans walk on two legs, not four. As a dog, I can stand on my hind legs for short amounts of time, but it is much easier walking on four legs. When it is winter and slippery roads, as it is now, it is also much safer.

Human scientists have explored the possible reasons why humans are bipeds for a long time. There are new clues every now and then. I find this almost as interesting as new evidence on the origin of dogs. It is intriguing to know more about ancient human history.