How old is the moon? Not as old as we once thought. The moon is likely to be 4.4 billion to 4.45 billion years old, or about 100 million years younger than previously thought, according to new research by geochemist Richard Carlson of the Carnegie Institution ...
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Two million years ago, the supermassive black hole at the center of our galaxy was 100 million times more powerful than it is today.
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