history:h_preh1
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| history:h_preh1 [2026/01/02 05:28] – [Cenozoic "recent life" era:] gary1 | history:h_preh1 [2026/05/30 02:19] (current) – [Cenozoic "recent life" era:] gary1 | ||
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| Line 362: | Line 362: | ||
| * 41,000yrs ago - a supernova at a distance of 250 light years may have wiped out mammoths | * 41,000yrs ago - a supernova at a distance of 250 light years may have wiped out mammoths | ||
| * mammoth tusks dated at 34,000 years old were found to contain tiny impact craters, apparently produced by slightly radioactive, | * mammoth tusks dated at 34,000 years old were found to contain tiny impact craters, apparently produced by slightly radioactive, | ||
| + | * 42,000yrs ago, a 200m wide meteorite hits Sth Korea forming the Hapcheon impact crater (([[https:// | ||
| * migration of humans across continents | * migration of humans across continents | ||
| * humans crossed over into the New World by means of the Bering land bridge. | * humans crossed over into the New World by means of the Bering land bridge. | ||
history/h_preh1.txt · Last modified: 2026/05/30 02:19 by gary1