Gibbon pump theory

Gibbon pump theory explains how orangutans use their arms to move through the canopy efficiently. When an orangutan reaches from one branch to another, it swings its arm forward with a coordinated motion that "pumps" energy into its body. This movement creates momentum, making the next swing easier and conserving strength. Essentially, they use each swing's momentum to "pump" themselves forward, much like how a well-pumped swing allows a child to go higher with less effort. This efficient motion helps orangutans traverse their environment smoothly while conserving energy.