My trivia and facts on the Universe. Asteroids, black holes, distances, galaxies, light, Mars rovers, Moon landings, stars, Titan, Voyager program, and other Universe trivia and facts.
Monday, February 1, 2010
Earth - trivia 1
1) What is the approximate age of the Earth?
a) 4.5 million years old b) 4.5 billion years old c) 4.5 trillion years old
1 comment:
1) (b) 4.5 billion years old
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