English novelist Jane Austen is known for her polished prose, but her handwritten manuscripts reveal some telling grammatical errors. Hulton Archive/Getty Images hide caption

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A programmable LED pumpkin at hacker space HacDC, in Washington, D.C., designed by member David Kaufman. Many Halloween purists prefer to design, rather than buy, high-tech ghouls, goblins and ghosts. Jacob Fenston for NPR hide caption

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Jennifer Lopez (seen on stage this weekend) is one of several celebrities who could add one initial and have a totally different life. Kevin Winter/Getty Images North America hide caption

itoggle caption Kevin Winter/Getty Images North America

Researchers say one reason physicists are good at poker is because their brains are particularly attuned to thinking about probability, statistics and modeling. Mikko J. Pitkanen/iStockphoto.com hide caption

itoggle caption Mikko J. Pitkanen/iStockphoto.com