Crossword puzzle clue "the time of many billions of lives"

Here are the possible solutions for the time of many billions of lives clue

Answer
Clue
Relevancy
eon
Clue
The time of many billions of lives
Definition
a long period of time, also AEON
eons
Clue
Billions and billions of years
Definition
EON, a long period of time, also AEON
many
Clue
Billions and billions
Definition
a great number
sagan
Clue
Carl who said "billions and billions . . ."
"Billions and Billions" author Carl
"Billions and billions" astronomer
"Billions & Billions" author Carl
"Billions & Billions" author

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