Human bipedalism is a rare and distinct form of locomotion, unlike that of any other animal. Despite its uniqueness, its evolutionary origins and ecological significance remain elusive. By walking on two legs, early hominins not only freed their hands to hold, manufacture, and use stone tools, but also gained the ability to interact with the environment in new ways, driving innovations in social structure, diet, and survival strategies. This ultimately led to the success of Homo, our genus.