5

Sunni imam Aziz Babaei, in his prayer room in Tehran, has been telling other Iranian Sunnis to be careful. One radical act, he warns, could bring pain on the whole community. Steve Inskeep/NPR hide caption

toggle caption Steve Inskeep/NPR
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7

An attendee wears a Hillary Clinton campaign sticker at a rally in Columbia, S.C. last month. Young voters in Iowa and New Hampshire have helped fuel Bernie Sanders' candidacy, but as the race moves to South Carolina, a lot could change. Bloomberg/Bloomberg via Getty Images hide caption

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Green when young, and about the size of an adult human's hand when full-grown, Dryococelus australis is more commonly known as the Lord Howe Island stick insect, or the tree lobster. Courtesy of Rohan Cleave/Melbourne Zoo hide caption

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