Locomotion

We are trying to understand the locomotion of one of our closest living 1, which is the orangutan, and also the locomotion of all of the apes and the common ancestor of humans and the other apes. And in that area, we have had a big problem 2, and that we know a lot about how they move around the forest. I've been out to the forest and spent a year recording the 3 types of locomotion they use, but we have no idea about the 4 cost of how they move around the forest and the solutions that they find to problems of moving around the canopy. And what we're doing here is using the park or athletes as an analogy for a large bodied ape moving around a complex 5 and getting them to move around in the course that we've made that they've never seen before. And we're going to record their energetic expenditure while they're doing it.