31.   The water appears to come from countless comets that have pounded the lunar surface over millions of years, said project scientist Alan Binder.

32.   The water was discovered by an instrument that measures the speed at which neutrons bounce off materials near the lunar surface.

33.   They believe that the most likely explanation is the evaporation of atoms from the lunar surface when it is struck by light particles called photons coming from sunlight.

34.   An attempt to find water on the moon by crashing a used spacecraft into the lunar surface has come up dry, researchers say.

35.   He piloted the command module that orbited the moon while astronauts Alan Shepard and Edgar Mitchell landed on the lunar surface.

36.   Nixon had the happy duty of putting in a phone call to them while they stood on the dusty lunar surface.

37.   The proposed experiments cover the chemistry of the moon, imaging the lunar surface and use of spectroscopy, the statement said without elaborating further.

38.   They stuck poles holding sheets of aluminum foil in the lunar surface and brought them back along with their cache of moon rocks.

39.   Five scientific instruments on the craft will examine the lunar surface for uranium, aluminum and calcium.

40.   They would allow a satellite to be put into orbit around the moon and the sending of two unmanned probes to the lunar surface.