• Left behind on the moon were the footprints of Armstrong and Aldrin, an American flag and scientific equipment.

    VOA: special.2009.07.15

  • Scientific American magazine says huge lasers turn only about twenty to thirty percent of the energy they use into a laser beam.

    VOA: special.2010.09.01

  • The study appeared in the official scientific journal of the American Academy of Physical Medicine.

    VOA: special.2010.02.03

  • Dr.Brook, who chaired group that produced a scientific statement on air pollution and cardiovascular disease for the American Heart Association.

    VOA: standard.2010.08.04

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