November 1, 2018
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How much you know about the Earth.

Current thinking is that the Earth was formed about 4.6 billion years ago; when is it estimated that oxygen first became a significant element in the Earth's atmosphere?
Which global charitable foundation, founded in 1936 and headquartered in London, works to improve health and support work in science, the humanities, the social sciences, education, public engagement
Which nation tested the most powerful nuclear weapon ever detonated?
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