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category_outlined / 科学
National Geographic MagazineNational Geographic Magazine

National Geographic Magazine February 2019

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.

国家:
United States
语言:
English
出版商:
National Geographic Society
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12 期号

本期

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how can big data make a difference?

“Big data” lives up to its name: We produce 2.5 quintillion bytes of data every day through the staggering array of digital connections that link people, objects, and devices. Every email, text, post, online search, app interaction, card transaction, and doctor’s visit contribute to the three V’s that define big data: volume, velocity, and variety of information, in greater amounts than ever before (it’s estimated that 90 percent of all data in existence was generated in the last two years). But to be useful, another V is needed: value. Extracting value takes powerful computers, complex algorithms, and extraordinary brainpower, a combination that saw “data scientist” hailed as the world’s sexiest job. But is big data really making a difference? Many believe it is. Retailers are using it to enhance our shopping experience,…

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what’s coming

NAT GEO BOOKS 100 Parks, 5,000 Ideas Showcases the Best of U.S. and Canadian Parks National Geographic pairs stunning photography with expert travel advice about 100 national, state, and city parks in this sequel to the best-selling 50 States, 5,000 Ideas. Consult the book’s top-10 lists to find the best destinations for river trips, monuments, panoramic views, beaches, and more. Available February 12 where books are sold and at shopng.com/books. TELEVISION New Episodes of Life Below Zero Intrepid residents of remote spots in Alaska pit their survival skills against carnivorous wild animals, whiteout storms, and other perils in the Emmy Award–winning series. New episodes air Tuesdays at 9/8c on National Geographic. NAT GEO WILD Night Stalks Animals in Dead by Dawn Mother Nature shows her sadistic side in TV’s first nature horror series, Dead by Dawn. Inspired by…

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technology’s peaks and valleys

I WAS AN EDITOR at the San Jose Mercury News in 1989 when, at 5:04 p.m. on October 17, tectonic plates shifted under the Santa Cruz Mountains in Northern California and the ground started rumbling. When the magnitude 6.9 earthquake finally stopped, scores of people had lost their lives; parts of the Bay Area would not fully recover for a decade. At that same time, other forces were shaking Silicon Valley, though many of us didn’t realize it. The information industry was being radically transformed by technologies coming to life all around us—an upheaval that continues today, with enormous implications. Technology reporter Michelle Quinn has been there to cover it all, from the early days of the dot-com bubble until now, when digital devices touch every aspect of our existence, for good…

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south africa’s majorettes

LOOKING AT THE EARTH FROM EVERY POSSIBLE ANGLE…

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the backstory

KNOWN AS DRUMMIES, drum majorettes began appearing in Cape Town street parades in the 1970s. Today they’re part of competitive clubs, often in schools. Though open to everyone, these teams tend to attract girls from marginalized communities. The long hours of repetitive practice are appreciated as a way to build confidence, pride, and a positive work ethic. Girls as young as five and women into their 20s are drawn to the mix of cheerleading and marching band. They rehearse elaborate routines for regional competitions, where their appearance and precision earn them accolades. But they’re also judged on leadership and character. South African photographer Alice Mann started taking pictures of drummies in 2016. She was attracted by their energy, femininity, and empowerment. Mann watched the girls practice and perform. She noticed how a…

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how ketchup made food safer

THE DISCOVERIES OF TODAY THAT WILL DEFINE THE WORLD OF TOMORROW KETCHUP—THAT CHEERFUL RED SAUCE sold in handy glass bottles—first came on the American market in the 19th century. But its ingredients were shockingly different than they are today. Food advocates complained that the sauce was frequently made from tomato scraps thickened with ground pumpkin rinds, apple pomace (the skin, pulp, seeds, and stems left after the fruit was pressed for juice), or cornstarch, and dyed a deceptive red. One French cookbook author described the ketchup sold in markets as “filthy, decomposed and putrid.” By the late 19th century, it would become less putrid, as manufacturers added chemical preservatives to slow decomposition in the bottle. But the real change—the invention of modern ketchup—occurred in the 20th century, and it’s a story of both…

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