| A | B |
|---|
| primate | A group of mammals that includes humans, apes, and monkeys. |
| primates | Group of mammals that are distinguished by opposable thumbs and binocular vision |
| hominid | A family of humans and several extinct humanlike species, some of which were human ancestors. |
| australopithecine | An early hominid that evolved more than 3.6 million years ago. |
| Neanderthal | A species of hominid that lived in Europe and Western Asia from 250,000 years ago to 30,000 years ago. |
| Cro-Magnons | This group coexisted with Neanderthals and had smaller and flatter faces. |
| Homo erectus | Began the expansion of human population across the globe. |
| Homo habilis | Was known as the handy man |
| Mary Leaky | Discovered 3.6 million year old footprints. |
| prosimian | means " before monkeys" |
| binocular vision | two eyes are located at the front of the head providing a 3D image. |
| opposable thumb | Provides primates top grip objects. |
| bipedalism | The ability to walk upright. |
