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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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Gregoire Vion

Colorful fireworks explode in the air. iStockphoto.com 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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The Leviathan melvillei attacks a medium-size baleen whale in this artist's rendition. C. Letenneur/MNHN hide caption

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Lev Yilmaz

Tiny metal electrodes are attached to Albert Einstein's head to pick up impulses from his brain and to magnify and record them for study in 1950 in Princeton, N.J. Dr. Alejandro Arellano kneels beside him. AP/NAP 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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