Are humans the only living bipedal primate?

That's a great question! While humans are the only fully bipedal primate, there are other primates that exhibit partial bipedalism.

Here's the breakdown:

* Humans are the only primate species that consistently walks upright on two legs.

* Some other primates, like chimpanzees and gorillas, can walk bipedally for short distances, but their primary mode of locomotion is quadrupedal (walking on all fours).

So, while humans are the only fully bipedal primate, there are other primates that can walk upright occasionally. It's important to remember that evolution is a spectrum, and even within a species, individuals may vary in their level of bipedal locomotion.