Did you know? Time since the emergence of multicellular life (2.1 billion y) is 5 x Time since the end of the Silurian geologic period (419 million y)
One average human generation ...
Lifespan of horse ...
Period of Pluto's orbit ...
Period of Neptune's orbit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.
