skull – n. the part of the head that is made of bone and protects the brain

fossil – n. part of an animal or plant from thousands of years ago, preserved in rock

extinct – adj. no longer living or existing

tempo – n. the speed at which something happens

mode – n. a way of doing something

evolution – n. the way in which living things gradually change and develop over millions of years

species – n. a set of plants or animals in which the members have similar characteristics to each other

anthropologist – n. a person who studies human development and society or different societies

pattern – n. a particular way something is done, is organized or happens

diverse – adj. including many different kinds