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In the autumn-foliaged town of Tyngsboro, Mass., the U.S. space program last week got a handsome present. It is the world’s most sensitive radio antenna, a 120-ft. aluminum dish named Haystack for the ...

A graphic artist who designs digital seek-and-find pictures is testing people’s attention to detail with a brain teaser featuring a needle in a haystack. Gergely Dudás, of Budapest, Hungary, has ...