the.com/eon
a billion years pretending to be a single word, and absolutely winning the bluff
geologic rankthe largest chunk of geologic time, above eras
current eonwe live in the Phanerozoic, just 539 million years
hidden majorityEarth spent most of its life pre-Phanerozoic, lifeless or microbial
loose usagecasually means forever, scientifically means about a billion years
greek rootsfrom aion, meaning age or lifetime