Nature, Humanity, and History,to 3500 b.c.e.
| 124824691 | australopithecines | several human like primates that existed in Pleistocene era | 0 | |
| 124824692 | hominids | humans as members of a family of primates | 1 | |
| 124824693 | bimetallism | walking upright with two legs | 2 | |
| 124824694 | Great Ice Age | known as Pleistocene epoch | 3 | |
| 124824695 | Homo habilis | handy man | 4 | |
| 124824696 | homo erectus | upright man | 5 | |
| 124824697 | homo sapiens | wise human | 6 | |
| 124824698 | Stone age | contains both Paleolithic (Old stone Age) and Neolithic(New Stone Age) | 7 | |
| 124824699 | foragers | hunting and food gathering people | 8 | |
| 124824700 | Agricultural Revelations | change of food production and rise of agriculture in many different places | 9 | |
| 124824701 | Holocene | the geological era since the end of the great Ice Age | 10 | |
| 124824702 | megaliths | big stones | 11 |

