About This Book
Dates form the backbone of written history. But where do these dates come from? Many different calendars were used in the ancient world. Some of these calendars were based upon observations or calculations of regular astronomical phenomena, such as the first sighting of the new moon crescent that de...
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Reading Time Estimates
6h 7m
slow reader
180 WPM
4h 24m
average reader
250 WPM
3h 9m
fast reader
350 WPM
π 66,000 wordsπ
9 days at 30 min/day
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WPM
Reading time
4 h 24 min
at 250 words per minute
Audiobook (1.5x)
4 h 53 min
at 1.5x narration speed
Audio 1x
7 h 20 min
Audio 2x
3 h 40 min
That's about:
- π 9 daysΒ reading 30 min/day
- π9 commutesΒ of 30 min each