Bipedal refers to the ability to walk on two legs. This form of locomotion is common in many species, including humans and some animals like birds and kangaroos. Bipedalism allows for greater mobility and the ability to cover long distances while freeing the hands for other tasks. In humans, bipedalism is a key characteristic that distinguishes us from many other mammals. It is believed to have evolved to help our ancestors adapt to changing environments, enabling them to travel efficiently and use tools. This unique trait has significant implications for our anatomy, including the structure of the spine and pelvis.