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Origin of the Big Bang Theory

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When was the Big Bang theory first proposed, and by whom?
A

In the early 1500s by Galileo.

B

In the 1920s by Georges Lemaître, whose work was subsequently supported by Edwin Hubble's research.

C

In the 1940s by Albert Einstein.

D

In the 1800s, with no specific scientist credited.

E

In 1989 by Edwin Hubble.

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