Crossword puzzle clue "time in earth's history"

Here are the possible solutions for time in earth's history clue

Answer
Clue
Relevancy
aeon
Clue
Time in earth's history
Part of the earth's history
Definition
the largest division of geological time, composed of several eras, also EON
ufo
Clue
"__ Hunters": History Channel show with the tagline "Hoax or History?"
marx
Clue
Who said history repeats itself "the first time as tragedy, the second time as farce"
eon
Clue
Period in the earth's history
Definition
a long period of time, also AEON
geology
Clue
Study of earth history
Definition
the science of the origin and structure of the earth
iceages
Clue
Glacial periods in the Earth's history
quaternary
Clue
Pertaining to the present period in earth history
Definition
a set of four

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