Chimpanzees, like this mother and child in Republic of Congo, is an endangered species closely related to bonobos, gorillas, orangutans . . . and human beings.
Photograph by Michael Nichols, National Geographic
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anything an organism does involving action or response to stimulation.
small mammal (primate) native to Central African forests.
large, intelligent ape native to Africa.
to pursue and kill an animal, usually for food.
earlier, or the one before.
type of mammal, including humans, apes, and monkeys.
type of tropical grassland with scattered trees.
weapon made of a long metal or wooden shaft with a sharp, pointed end.
body of flowing water.
small insect that feeds on wood.
instrument used to help in the performance of a task.
main shaft or stem of a tree.