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  1. Cooperative strangers turn a mutual profit

    In social exchanges, monkeys and people often appear to act according to the principle that "one good turn deserves another."

    By Bruce Bower
  2. Tech

    Coal: The cool fuel for future jets

    To power faster supersonic jets, scientists are developing coal-derived fuels that can absorb heat without breaking down at high temperatures.

    By Tina Hesman Saey

  3. How whales, dolphins, seals dive so deep

    The blue whale, bottlenose dolphin, Weddell seal, and elephant seal cut diving energy costs 10 to 50 percent by simply gliding downward.

    By Susan Milius

  4. 19140

    Unfortunately, scientific reports on the widely disclosed environmental dangers of using MTBE in gasoline still routinely repeat the state and federal EPA propaganda that MTBE and other oxygenates such as ethanol are beneficial to cleaning the air.