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70 Million years ago mammal
First 5000 years
10 Thousandth 5000 years
5 scale 5000 years = 25000 years
1 Billion years Human History
First 50 Million Years Period
200 Thousand - 100+ Thousand Cycle Human Civilization Period
少於兩萬,多於一萬期人類文明時期
一萬九千九百九十八期人類文明時期
First Cycle Human CIivlziaiton
前九千九百九十九期人類文明時期
First 5000 years
First Cycle Human CIivlziaiton
Last 50 Million Years Period
10 Thousandth 5000 years
後九千九百九十九期人類文明時期
27,998,000 BCE Human Skull
28,000,000 years ago Human Skull
27.9 Million BCE Human Skull
28 Million years ago Human Skull
Last 5000 years
Last Cycle Human CIivlziaiton
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