Science and technology

Associated Press
In this Friday, Sept. 12, 2014 photo provided by the National Oceanic and Atmospheric Administration, an undersea robot is shown on the deck of the NOAA research vessel Fulmar near the Farallon Islands, 30 miles off the coast from San Francisco. Federal researchers are exploring more than a dozen underwater sites where they believe ships sank in the treacherous waters outside the Golden Gate in the decades following the Gold Rush. During a five-day expedition, a team from NOAA used sonar and an underwater vehicle to examine and photograph the historic shipwrecks in the Gulf of the Farallones Marine Sanctuary, where more than 300 vessels are believed to have sunk. (AP Photo/NOAA)

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