How long ago did the big bang catalyze the beginning of the universe?
a. 13.7 billion years ago
b. 1.37 billion years ago
c. 4 billion years ago
d. 40 billion years ago
ANS: A
The "big bang" was the catalyst for the formation of the universe. It is thought to have occurred
approximately 13.7 billion years ago at a concentrated geometric point. Information can be found in
the section Stars and Seas
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