“Geologic time scale” - https://en.m.wikipedia.org/wiki/Geologic_time_scale https://en.m.wikipedia.org/wiki/Geologic_time_scale - discusses “eon”. (I didn’t re

“Geologic time scale” - https://en.m.wikipedia.org/wiki/Geologic_time_scale https://en.m.wikipedia.org/wiki/Geologic_time_scale - discusses “eon”. (I didn’t realize the term meant anything other than “a long time.”)