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  1. Let there be light

    Ultraviolet light may have favored, not hindered, the creation of RNA on early Earth.

    By John Travis

  2. U.S. survey probes depression care

    More than half of all people with major depression now seek treatment for the disorder, but only 1 in 5 depressed people receives what psychiatrists consider to be adequate medication and psychotherapy.

    By Bruce Bower

  3. 19330

    With the facts as given in this article, the birds spent about 7 percent of their time flying and 93 percent not flying. At the energy rates given, I get that 25 percent of the energy used was spent during the 7 percent of time the birds were flying.