The second unit of time in the Epic Time Scales (the numbers in parentheses) is called the Genesis.
Coincidentally, the time of the advent of the dinosaurs and the advent of the genus Homo is separated roughly by a factor of one hundred. Dinosaurs evolved about 231 to 243 million years ago . The genus Homo made its appearance between 2 and 3 million years ago. (There is a lot of debate as to when precisely Australopithecus evolved to the genus Homo, with a lot of it being a debate over criteria for Homo.) The Eon and Genesis are, as such, related to the advent of the dinosaurs and the genus Homo. Eighteen Eons have passed since the creation of the Earth, and sixteen Geneses have passed since the end of the last eon.
As such, the Earth Epic Calendar sets the Genesis unit of time at 2.5 million years, with one hundred geneses making up an Eon.
It is quite convenient that the two largest units of time in the Earth Epic calendar correspond to developments in Earth history that most people are quite familiar with: the advent of dinosaurs and the advent of the genus Homo. Knowing that a factor of one hundred separates the two events also tells us a lot about Earth history.
Dividing the estimated age of the Earth by the length of an eon (4.54 billion by 250 million) gives us exactly 18.16 Eons. Since a genesis is one-one hundredth of an eon, we can say that we are in Eon 18, Genesis 16.
It must be noted, however, that 18.16 Eons since the creation of the Earth is an estimate. The margin of error in the estimate of the Earth’s age is currently 40 million years or (isn’t this a coincidence?) 16 Geneses in either direction. This means that within the margin of error, we could be in either Genesis 0 or Genesis 32 within Eon 18. If science provides us with a more accurate estimate of Earth’s age, we can adjust the Epic Time Scale accordingly, without having to adjust most of the rest of the Calendar. Otherwise, for now, Eon 18, Genesis 16 is the best estimate we can make.
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