Did you know?
Time since the end of the Triassic geologic period, mass extinction (201 million y) is 100 thousand x Time since the birth of Hero of Alexandria (2,008 y)
Tweet this comparison
Time since the birth of Diophantus (1,810 y)
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
Click here to learn more about it.