Grooming is the single most important social activity of chimpanzees, taking up a large chunk of daily rest periods. This is when chimps nourish friendships, comfort one another, and patch up disagreements.
Chimpanzees can be found from Southern Senegal across the forested belt north of the Congo River to Western Uganda and Western Tanzania. Gombe National Park in Tanzania is the first park in Africa specifically created for chimpanzees.
The differences between chimpanzees and bonobos are pretty subtle. Bonobos tend to be smaller than chimps, and have longer legs, shorter arms, and a narrower trunk comparatively. They also have a rounder skull and flatter face.