Did you know:
Time since the emergence of earliest reptiles (315 m y) is 5 x Length of one Alautun, longest unit in Mayan calendar (63.1 m y)
Tweet this comparison
If you appreciate this site, do us a favour and click on the ad above. We'll earn a penny or two and that will help us keep going.
You'll know that you have done a good thing for numeracy and rationality in the world!