Why are so many feral chickens crossing the road in Maui? To get a rental car, of course. Stephanie Federico/NPR hide caption

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A sip or a hit? Jack Faller sucks up a bourbon Vaportini at Red Kiva lounge in Chicago. Courtesy of Andrew Nawrocki/Time Out Chicago hide caption

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Seeds of fear? To most of us, cantaloupe and horn melon look like a healthy breakfast or snack. But the clusters of seeds can evoke anxiety, nervousness and even nausea for some trypophobes. Daniel M. N. Turner/NPR hide caption

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The British have long said, "Keep calm and carry on." But the catchphrase may need an update for health care. Keepcalm-o-matic.co.uk hide caption

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A well-traveled root: A vendor sells sweet potatoes at a market near Manila in 2011. The Portuguese brought the root to the Philippines all the way from the Caribbean. Ted Aljibe/AFP/Getty Images hide caption

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A copper engraving from 1656 shows a plague doctor in Rome wearing a protective suit and a mask. Artwork by Paul Furst /Wikimedia.org hide caption

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