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Related articles:
Year
Orders of magnitude (time)
Before Present
Mya (unit)
Dinosaur
Earth
Key terms: year unit ago time long symbol annum small ka mya iso geology short scale formerly used billion long scale deprecated singular accepted usual symbol magnitude accusative scientific unit of time equal julian year ays for the mean formerly used for ga either elapsed or ago Search external links cited by footnotes on Wikipedia page Annum: |
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