bipedalism

/bahy-ped-l-iz-uhm/US // baɪˈpɛd lˌɪz əm //

双足主义,双脚踏地,双脚踏地主义,双体主义

Definitions

n.名词 noun

1
- : the condition of being two-footed or of using two feet for standing and walking.

Instead, they’re up in the trees, moving with hand-assisted bipedalism, much like an orangutan, gibbon, and siamang do now.
In fact, bipedalism could have evolved independently in different hominins in Africa.
In that case, bipedalism wouldn’t be a new locomotion, it’d be an old locomotion.
You could get the independent evolution of bipedalism multiple times.
Darwin hypothesized that bipedalism and tool use and canine reduction and brain size evolve in concert.