How come dogs have four legs, instead of two, like us humans?
Dogs have evolved over time to have four legs because of the advantages it provides them in terms of movement and balance.

Four legs allow dogs to run faster, with greater stability and maneuverability, than they would be able to with just two legs. This is especially important for wild dogs that need to hunt for their food. Having four legs also helps dogs better navigate uneven terrain and maintain their balance when jumping, which is essential for many species of dogs that are used for hunting or herding.

In addition, having four legs also allows dogs to carry more weight than they would be able to with just two legs. This is important for breeds of dogs that are used for tasks such as pulling sleds or carrying packs.

So, in summary, dogs have four legs instead of two because it provides them with greater speed, stability, balance, and carrying capacity than they would have with just two legs. These advantages have helped dogs to successfully evolve and thrive in various environments and roles, both in the wild and as domesticated pets.