Friendly Company: The vuvuzela's characteristic buzzing sound hits the register at a B-flat, the same note that emanates from a supermassive black hole. Rajesh Jantilal/AFP/Getty Images hide caption

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Night turned into day on July 9, 1962, when the U.S. government exploded a hydrogen bomb 1,000 times more powerful than the bomb that hit Hiroshima above Earth's atmosphere. This is a sunset you don't ever want to see. Terry Luke/Honolulu Star-Advertiser hide caption

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A question: can you predict Alzheimer's by a careful analysis of someone’s writing? An English professor has suggested there are tell-tale signs of early Alzheimer's in Agatha Christie’s book, Elephants Can Remember. AFP/Getty Images hide caption

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