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Not only are orchids studied at the Smithsonian Environmental Research Center in Maryland, they thrive on the 3,000-acre grounds, which, for the first time, are open to the public Monday through Saturday.
Stampede
This 1868 stamp is worth $935,000. No kidding. It’s the rarest U.S. issue. Just two exist. See one at the Postal Museum through September.
Origins of Ecotourism
Lured by romantic landscapes, 19th-century nature lovers flocked to Yosemite, Niagara Falls and the Catskills. Travel-related ephemera and paintings (including an 1873 Winslow Homer) are at New York City's Cooper-Hewitt until October 22.
Go With the Floe
"Antarctica can't be tamed," writes Joan Myers, who photographed a water-carved iceberg off the Antarctic Peninsula from an inflatable raft in 2003. Her oh-so-cool images are at the National Museum of Natural History through July 23.
