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| c. 30,000 years ago |
| | | With the sea level falling, a land bridge (known as Beringia) forms between Siberia and Alaska, enabling humans to enter the continent of America | |
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| c. 15,000 years ago |
| | | The La Brea tarpit in Los Angeles shows signs of human activity in the region | |
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| c. 15,000 years ago |
| | | Archaeological evidence reveals that the central plains of north America by now have a widespread human population | |
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| 15,000 to 10,000 years ago |
| | | Hunter-gatherers gradually extend their territory far into South America | |
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| 8000 BC |
| | | As the ice cap recedes, hunter-gatherers move up the eastern side of America into Newfoundland and the prairie provinces of Canada | |
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| c. 8000 BC |
| | | As temperatures warm, the sea level rises, submerging the Bering land bridge and isolating the Siberian immigrants as the aboriginal Americans | |
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| 5000 BC |
| | | Human groups adapt to the conditions of northern Canada and then Greenland, living mainly as hunters of marine mammals | |
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| c. 5000 BC |
| | | Squash and chili are the first plants to be cultivated in America, in the Tehuácan valley in modern Mexico | |
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| c. 3000 BC |
| | | The llama and the alpaca, two south American members of the camel family, are domesticated | |
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| c. 3000 BC |
| | | Complex societies, with sophisticated temple architecture, develop at sites such as Aspero and Caral in the Norte Chico region of Peru | |
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