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National Geographic Magazine

National Geographic Magazine March 2017

The latest news in science, exploration, and culture will open your eyes to the world’s many wonders. Get a National Geographic digital magazine subscription today and experience the same high-quality articles and breathtaking photography contained in the print edit.

국가:
United States
언어:
English
출판사:
National Geographic Society
빈도:
Monthly
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on the side of science

In the past three years, this magazine has run 34 stories on climate change— including a special issue devoted entirely to the topic. Our commitment is ongoing. In the April issue, to mark Earth Day, we’ll publish a guide that separates fact from fallacy on climate change and a feature story on how rising temperatures are affecting Alaska. Later this year we’ll offer looks at the Arctic, Antarctica, the Galápagos Islands, and other places at risk as the world warms. Our television channel is airing a documentary film and a three-part series on water issues. And that doesn’t count the hundreds of climate stories we have published on nationalgeographic.com. Covering our climate—where we keep setting records for the hottest year—is one of the most important things we can do. It’s especially crucial in…

1
visions

Order prints of select National Geographic photos online at NationalGeographicArt.com. Andrew Richard Hara Hilo, Hawaii Hara, a professional photographer, had been to the summit of Mauna Kea hundreds of times in search of a clear sky. A meteor shower in July 2014 offered cosmic dramatics. “I think being at only 60 percent oxygen helps me focus on what makes a great image,” he says.…

1
tools and technology

On the southeastern edge of the Greenland ice sheet, a blast of Arctic wind hit the three kite-skiers. Sarah McNair-Landry’s kite billowed, but with her safety latch jammed, the gust yanked her 20 feet into the air. She dropped headfirst onto the ice, cracking her helmet and briefly blacking out. The accident almost derailed her expedition with kayakers Ben Stookesberry and Erik Boomer—an expedition to kite-ski from east to northwest across Greenland. But the three continued on, wearing skis while harnessed to giant kites designed to catch the wind and propel them across 600 miles of ice. “You’ve got these amazing winds and conditions in Greenland,” says McNair-Landry. “You can travel so much faster and farther, especially while pulling sleds, than you would if you were just skiing.” On some days the…

2
recovering erased wisdom

Built in the sixth century at the foot of Mount Sinai in Egypt, St. Catherine’s Monastery is the world’s oldest such institution in continuous use. Its library preserves hundreds of manuscripts collected during medieval times—classical texts, scriptures, and other documents of interest to the monks. But it turns out that people recycled the pages of some of those manuscripts, erasing texts they no longer needed. Since 2011 the monastery has been working to recover some of those long-lost erasures using modern digital technology. About half of the library’s manuscripts were written on parchment, the specially prepared skin of a calf, goat, or sheep. Parchment can be recycled by scraping off any ink and writing on the fresh surface. The old text isn’t entirely gone, though. It remains embedded in the page…

1
animal hacks

Humans aren’t the only creatures to use tools. Archerfish shoot water droplets from their mouths to fell insects. Octopuses carry coconut shells to serve as shelter. Orangutans borrow canoes to forage for aquatic plants. “Tool use is widespread and diverse,” says biologist Robert W. Shumaker. But it’s not necessarily a sign of intelligence. “We don’t even attempt to classify examples as thinking or not thinking,” he says. For some animals, like the archerfish, tool use is mostly instinctive: Each individual of the species does it, in the same way. Other animals learn their skills: Before the canoeing orangutans ventured out on the water, they observed how humans used the craft. Differences in animal tool use Each layer represents a mode of tool use. Colored bars next to the animals’ names indicate which behaviors have…

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nit-picking in ancient chile

Lice have plagued humankind throughout history. Spreading from person to person by close contact, they latch onto hair with hooklike claws and pierce the scalp to suck up a meal of blood. The result is often a very itchy head. Relief comes only with the removal of all traces of infestation—the insects, each about the size of a sesame seed, and the tiny eggs they lay, known as nits. Picking off the parasites one by one is tedious, so many cultures have crafted fine-tooth combs to hasten the job. Combs of wood, bone, and ivory have turned up at ancient sites in the Old World, but solid evidence for such tools in the Americas was lacking until a recent study in northern Chile. That research focused on a museum collection of double-sided…