Vol. 188 No. 9
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More Stories from the October 31, 2015 issue

  1. Physics

    Raw chicken, ingenuity make a time-reversal mirror

    A new phase-conjugation mirror sends light waves back where they came from, allowing physicists to reconstruct images even if the original light was severely scrambled.

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  2. Life

    For people, mealtime is all the time

    People eat for most of their waking hours, which may affect sleep and weight.

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  3. Paleontology

    New dinosaur identified in Alaska

    New species of duck-billed dinosaur discovered in the Alaskan permafrost.

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  4. Health & Medicine

    What makes cells stop dividing and growing

    Scientists have found that the protein GATA4 helps control cellular senescence, and may be a target for treating aging-related diseases.

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  5. Chemistry

    Elusive acid finally created

    Cyanoform, a chemical sought for more than a century and written into textbooks, is one of the strongest organic acids.

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  6. Math

    83-year-old math problem solved

    An 83-year-old math problem concerning sequences of 1s and –1s has been solved.

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  7. Planetary Science

    Mysterious circles appear, grow on comet

    The Rosetta spacecraft caught five circular depressions quickly spreading across a region of comet 67P.

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  8. Planetary Science

    67P reveals recipe for a comet

    Rosetta’s comet 67P probably started out as two smaller comets.

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  9. Animals

    Math describes sheep herd fluctuations

    Scientists have developed equations to describe the motion of a herd of sheep.

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  10. Animals

    Lights at night trick wild wallabies into breeding late

    Artificial lighting is driving wild tammar wallabies to breed out of sync with peak season for food

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  11. Anthropology

    Bronze Age mummies identified in Britain

    Bone analysis finds widespread mummy making in ancient England and Scotland.

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  12. Genetics

    Brain cells’ DNA differs

    Every nerve cell may hold different DNA, a new study suggests.

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  13. Earth

    Giant asteroid may have triggered deadly volcano eruptions

    Increased volcanic eruptions coincided much more closely with an asteroid impact and the extinction of the dinosaurs than previously believed, a new study suggests.

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  14. Animals

    How to drink like a bat

    Some bats stick out their tongues and throbs carry nectar to their mouths.

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  15. Anthropology

    Ancient hominid ears were tuned to high frequencies

    Two ancient hominid species may have heard high-frequency sounds especially well.

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  16. Planetary Science

    Salt streaks point to present-day water flows on Mars

    Salt deposits on Mars hint at contemporary seasonal water flows on the Red Planet.

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  17. Health & Medicine

    Sperm protein may offer target for male contraceptive

    With the identification of a new sperm protein that helps sperm penetrate eggs, researchers may be closer to developing birth control pills for men.

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  18. Neuroscience

    Adolescent brains open to change

    Adolescent brains are still changing, a malleability that renders them particularly sensitive to the outside world.

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  19. Plants

    Early cyanobacteria fossils dug up in 1965

    In 1965, early photosynthetic plant fossils were discovered. The date of earliest oxygen-producing life forms has since been pushed much earlier.

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  20. Animals

    Marine biologist chronicles a lifelong love of fishing

    In A Naturalist Goes Fishing, a marine biologist takes readers on a round-the-world fishing expedition

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  21. Health & Medicine

    Hollywood-made science documentary series comes to TV

    Breakthrough series gives a closer look at scientists at work.

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  22. Chemistry

    Zippy videos teach chemistry behind everyday life

    The American Chemical Society breaks down complex reactions of everyday life in zippy online video clips.

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  23. Science & Society

    Nobels note neutrinos, DNA, drugs

    The Nobel Prizes in physics, chemistry and physiology or medicine ran the gamut this year, honoring both fundamental science discoveries and research with real-world impacts.

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