1000 years = 1 millennium so 3500 years = 3.5 millennia.
A millennium is every 1,000 years, so there are 3.5 millenniums in 3,500 years.
3,000 years in 3 millenniums.
7 millenniums is = to how many years
1000 millenniums is called a megannium.
11,000 years.
2000 years.
3000 years.
a 100000 years
There are 6000 years
8.
75,000 years. (A millennium is a thousand years.)
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