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  1. BOOK REVIEW: DNA USA: A Genetic Portrait of America by Bryan Sykes

    Review by Tina Hesman Saey.

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  2. Mathletics: A Scientist Explains 100 Amazing Things About the World of Sports by John D. Barrow

    See what math reveals about sports, from the possibility of speeding up Usain Bolt to the physics of high jumping’s backward flop. W.W. Norton & Co., 2012, 298 p., $26.95

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  3. Finding the Arctic: History and Culture Along a 2,500-Mile Snowmobile Journey from Alaska to Hudson’s Bay by Matthew Sturm

    A climate researcher intertwines the story of his own snow-mobile expedition with the history of life and exploration in the Arctic. Univ. of Alaska, 2012, 258 p., $24.95

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  4. The Case of the Green Turtle: An Uncensored History of a Conservation Icon by Alison Rieser

    The story of efforts to save green sea turtles, including by farming them, illustrates conflicts common to conservation work. Johns Hopkins, 2012, 338 p., $45

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  5. From Here to Infinity: A Vision for the Future of Science by Martin Rees

    An astrophysicist proposes ways for scientists and the public to tackle problems together, from climate change and energy to health care and population growth. W.W. Norton & Co., 2012, 144 p., $23.95

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  6. A Field Guide to Radiation by Wayne Biddle

    From “absorbed dose” to zirconium-95, this alphabetical collection of essays makes an interesting guide to the nuclear age. Penguin, 2012, 258 p., $16

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  7. Planetary Science

    Planetary Peekaboo

    Astronomers aren’t playing games when it comes to spotting an exoEarth.

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  8. Tech

    When Networks Network

    Once studied solo, systems display surprising behavior when they interact.

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  9. Chemistry

    Too-young caterpillars like scent of sex

    Larvae respond to mate-attracting pheromones, raising evolutionary questions about what a very grown-up chemical signal could mean to them.

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  10. Humans

    Herders, not farmers, built Stonehenge

    Farming’s temporary demise in ancient Britain may have spurred the creation of the iconic stone circle.

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  11. Planetary Science

    Voyager chasing solar system’s edge

    On the 35th anniversary of the spacecraft’s launch, scientists ponder when it will move beyond the sun’s reach.

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  12. Life

    Team releases sequel to the human genome

    ENCODE reveals the machinery that switches genes on and off.

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