Vol. 179 No. #9 Archives

More Stories from the April 23, 2011 issue

  1. Life

    Brain chemical influences sexual preference in mice

    Males lacking the neurotransmitter serotonin court both sexes equally, researchers are surprised to find.

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  2. Physics

    Diamond could store quantum information

    A new technique would use flaws in crystal structure to hold data.

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  3. Humans

    A new glimpse at the earliest Americans

    Along a stream in central Texas, archaeologists have found a campsite occupied at the tail end of the Ice Age.

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  4. Humans

    Go east, ancient tool makers

    New finds put African hand ax makers in India as early as 1.5 million years ago.

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  5. Chemistry

    Silicene: It could be the new graphene

    Single-layer sheets of silicon might have electronic applications.

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  6. Health & Medicine

    Obesity messes with the brain

    Excess weight may compromise memory and concentration, possibly by spurring inflammation that damages white matter.

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  7. Humans

    Noise is what ails beaked whales

    Large-scale experiments reveal a sensitivity to sonar, apparently at lower levels than other species.

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  8. Space

    Planets take shape in embryonic gas clouds

    A new theory of planetary formation may explain variety seen in extrasolar searches.

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  9. Chemistry

    Japan nuke accident seen from Seattle

    Radioactive particles retrieved in the Pacific Northwest offer clues to events inside the crippled Fukushima Daiichi plant.

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  10. Life

    DNA flaws can stack up as cancer grows

    Acute myeloid leukemia progresses by accumulating various mutations, according to an analysis of one man’s disease over time.

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  11. Humans

    Climate meddling dates back 8,000 years

    Cutting down trees put lots of carbon into the atmosphere long before the industrial revolution began.

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  12. Health & Medicine

    New brain cell growth restores function

    Regeneration in the hippocampus helps repair learning and memory after injury, mouse experiments suggest.

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  13. Space

    First shot of Mercury from orbit

    MESSENGER has radioed to Earth a new look at the first rock from the sun.

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  14. Health & Medicine

    Worms live longer with thioflavin T

    A dye commonly used by Alzheimer’s disease researchers to spot misshapen proteins gives lab nematodes longer lives, scientists say.

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  15. Humans

    Just breathing in Iraq can be hazardous

    Poor air quality is an added danger for troops, testing indicates.

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  16. Life

    Great-grandpa’s genes gone, effects stay

    Removing an obesity-preventing scrap of DNA from a mouse lineage doesn’t prevent descendants from reaping its slimming benefits for generations.

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  17. Humans

    Rising seas made China’s ancient mariners

    Ancient environmental changes produced a maritime culture that colonized Taiwan 5,000 years ago, archaeologists contend.

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  18. Paleontology

    Supersized superbunny

    Fossils reveal a non-hopping giant rabbit that lived on the island of Minorca 5 million years ago.

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  19. Life

    Worries grow over monarch butterflies

    Migrants overwintering in Mexico rebounded somewhat this past winter, but still trending downward.

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  20. Science Past from the issue of April 22, 1961

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  21. SN Online

    Highlights from recent online-only stories

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  22. Seven Wonders of the Universe That You Probably Took for Granted by C. Renée James

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  23. How Old is the Universe? by David A. Weintraub

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  24. Discoverers of the Universe: William and Caroline Herschel by Michael Hoskin

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  25. Cosmic Challenge: The Ultimate Observing List for Amateurs by Philip S. Harrington

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  26. Book Review: The Social Animal: The Hidden Sources of Love, Character, and Achievement by David Brooks

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  27. Book Review: The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos by Brian Greene

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  28. Better risk assessments through molecular biology

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  29. Strung together

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  30. Special cosmic edition: PDF download page

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  31. Out of the fabric

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  32. Hanging in the balance

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  33. Cosmic questions, answers pending

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  34. Pre-Bang branes and bubbles

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  35. In the dark

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  36. Letters

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  37. Science Future for April 23, 2011

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  38. Meteorites by Caroline Smith, Sara Russell and Gretchen Benedix

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