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A specific peptide -- a neurotransmitter called hypocretin -- greatly increased when subjects were happy but dropped when they were sad, U.S. researchers say.
Canadian researchers say a discovery of how seals can sleep with only half their brain at a time could help in research into human sleep problems.
The U.S. copyright for the "Superman" trademark will no longer be the sole property of Time Warner thanks to a federal judge's ruling last week.
The effects of sleep deprivation on cognitive performance can be reversed when the brain peptide, orexin-A, is administered in monkeys, a U.S. study found.
Warner Bros. says it will appeal a federal judge's finding that the WB's "Smallville" may be violating the copyright owned by the creator of "Superboy."
Researchers at the University of California at Los Angeles have learned newborn dolphins and killer whales and their mothers stay awake for a month after birth.
Scientists at the University of California at Los Angeles have discovered brain cells containing the chemical histamine are critical for waking.
Stories of modern science ... By United Press International
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United Press International
United Press International
