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  • Feature

    Deep network

    Gas bubbles effervesce from a mound of muck on the seafloor in a deep submarine canyon off the west coast of Canada. Microbes beneath the sediment belch the bubbles after feasting on the ancient remains of algae, sea critters and their poop: a primordial stew that’s been simmering since long before humans walked the Earth.

    This gassy oasis attracts an odd collection of critters. Worms...

    10/04/2013 - 15:00 Earth, Technology
  • News

    Spacecraft takes express tour of Martian moon

    The sharpest images yet taken by the Mars Express spacecraft of Mars’ tiny moon Phobos reveal features as small as 4.4 meters across, the European Space Agency announced March 15.

    Some of the new images taken March 7 during one of several recent close flybys of the moon home in on the proposed landing site for a Russian mission, Phobos-Grunt (meaning Phobos soil), that...

    03/15/2010 - 18:04 Atom & Cosmos
  • News

    Bat that roared

    Bats using sound to find their way in the dark boom louder than home fire alarms and rock concerts, according to new measurements.

    Fortunately all that noise stays at frequencies too high for human hearing, or bats would drive people batty.

    Measurements of sounds from 11 species of tropical bats revealed that all animals emitted extremely loud sounds, reports...

    04/30/2008 - 10:32 Life & Evolution
  • Feature

    That's One Weird Tooth

    What Martin Nweeia noticed first when he encountered narwhals, he says, was the sound. In May 2000, as spring was just reaching Baffin Island in the Canadian Arctic, a famed local hunter took Nweeia out on the ice searching the open water for those tusk-bearing, high-Arctic whales. "I was sitting on a bucket out on the ice doing polar bear watch," he says. At that time of year, daylight lasts...

    03/21/2006 - 14:43 Animals
  • Feature

    Infrasonic Symphony

    "Let me start off with a riddle," says NASA scientist Allan J. Zuckerwar. In his office in Hampton, Va., he rattles off items as dissimilar as rhinoceroses, supersonic aircraft, and hurricanes. "Now, what do they have in common?" The answer, Zuckerwar explains, is that each one generates silent infrasound—long sound waves at a frequency below 20 hertz. People can't hear anything below that...

    01/03/2004 - 14:55 Earth