Vol. 184 No. #1
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More Stories from the July 13, 2013 issue

  1. Animals

    Dead, live guppies vie for paternity

    Females can use sperm months after mates go belly up.

  2. Life

    Bird penises start strong, wither away

    Male chickens lose phalluses before hatching.

  3. Tech

    Camera captures voices without a microphone

    Throat movements get decoded to reveal sounds of speech.

  4. Animals

    Now-extinct wolf may be ancestor of modern-day dogs

    No strong signs of canine ancestry among living grey wolves.

  5. Tech

    Highlights from the International Congress on Acoustics

    Selections from the meeting held June 2-7 in Montreal include personal listening zones in cars and music of the body.

  6. Tech

    Faster memory could accelerate computing

    Experimental microchip improves reliability and speed of writing and reading data.

  7. Science & Society

    Chimps in captivity may soon join endangered species list

    Proposal would extend protections to both wild and captive primate populations.

  8. Health & Medicine

    Headers linked to memory deficit in soccer players

    Abnormalities in three brain regions found among those who head the ball most frequently.

  9. Life

    Nail-generating tissue also regrows fingertips

    Stem cells spur return of amputated digits in mice

  10. Life

    In the real world, cheetahs rarely go all out

    Famous for speed, the big cats actually rely on acceleration and maneuverability to capture prey.

  11. Chemistry

    An eel’s glow could illuminate liver disease

    Fluorescent protein binds to bilirubin, a compound the body must eliminate.

  12. Life

    Primitive fish could nod but not shake its head

    Ancient fossils reveal surprises about early vertebrate necks, abdominal muscles.

  13. Life

    Leprosy bacterium changed little in last millennium

    Genome alterations probably not responsible for decline in disease prevalence.

  14. Physics

    Simple invisibility cloaks hide toys, pets, people

    Using everyday materials, two research teams conceal ordinary objects by guiding light around them.

  15. Animals

    Oysters may struggle to build shells as carbon dioxide rises

    Ocean acidification could hamper larvae's growth.

  16. Tech

    Eye chip sends signals to blind rats’ brains

    When struck with light, retinal prostheses stimulate animals' visual cortices.

  17. Physics

    Echoes create an interior map app

    To record size and shape of a room, researchers use a speaker, five microphones and some math.

  18. Anthropology

    Snails trace Stone Age trek from Iberia to Ireland

    A genetic quirk linking snails in two distant areas suggests people brought escargot on their migration to the Emerald Isle.

  19. Humans

    Aerial radar sizes up ancient urban sprawl

    Angkor, the capital of Cambodia's Khmer empire, included carefully planned  suburbs that spread across the landscape.

  20. Health & Medicine

    Human brain mapped in 3-D with high resolution

    “BigBrain” model, the most detailed atlas yet, could improve brain scanning tools and neurosurgeons’ navigation.

  21. Earth

    Satellite captures Earth’s greenery

    Orbiting camera detects reflected light to determine the extent of the planet's vegetation.

  22. Science & Society

    Math targets cities’ essence

    New formula relates city size to infrastructure, productivity.

  23. Astronomy

    Postcards from Voyager

    Suzanne Dodd is project manager for NASA’s twin Voyager probes.

  24. Life

    Billion-Dollar Fish

    The Untold Story of Alaska Pollock by Kevin M. Bailey.

  25. Particle Physics

    When the atom went quantum

    Bohr's revolutionary atomic theory turns 100.

  26. Animals

    Cicadas’ odd life cycle poses evolutionary conundrums

    Scientists are getting an idea about the odd family tree of periodical cicadas, how the insects synchronize their life cycles and why they breed side-by-side with others unsuitable for mating.

  27. Letters to the editor

  28. Health & Medicine

    Nobelist’s Cancer Theory

    Excerpt from the July 13, 1963, issue of Science News Letter

  29. Science & Society

    Brilliant Blunders

    From Darwin to Einstein - Colossal Mistakes by Great Scientists That Changed Our Understanding of Life and the Universe by Mario Livio.