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| | TIMELINE COSMIC HISTORY page of ULTIMATE SCIENCE FICTION WEB GUIDE |
 | | All terrestrial planets had a similar process in their early histories." The Hadean Era "Once most of the planetesimals were gone, the planetary bombardment stopped, and a stable rocky crust was able to formed on the Earth. |
 | | Jay Cross' attempt at all-embracing chronology 71,300,000-65,000,000 BC: Danian Age of Paleocene Epoch of Paleogene Subperiod of Tertiary Period of Cenozoic Era The DOL Geologic Ages of Earth History 65,000,000-60,500,000 BC: Thanetian Age of Paleocene Epoch of Paleogene Subperiod of Tertiary Period of Cenozoic Era The DOL Geologic Ages of Earth History |
 | | By the end of his reign, his molars and jaw had shrunk to almost that of modern man." Adapted from onelife.com Stone artifacts and weapons (club, spear, axe...) 1,000,000 BC to 500,000 BC 1,600,000 - 500,000 BC: Homo erectus Stone artifacts and weapons "Homo erectus lived between 1.8 million and 300,000 years ago. |
| www.magicdragon.com /UltimateSF/timelineCO.html (13090 words) |
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