a

. After showing abundant photographic evidence for the presence of micrometeorites as small as 10^-15 g that “struck every square centimeter of the lunar surface,” Stuart Ross Taylor stated:

It has been thought previously that radiation pressure would have swept less massive particles out of the inner solar system, but there is a finite flux below 10^-14 g.  Stuart Ross Taylor, Lunar Science: A Post-Apollo View (New York: Pergamon Press, Inc., 1975), p. 90.

Large lunar impacts are continually churning up and overturning the lunar surface. Therefore, for these micrometeorite impacts to blanket the surface so completely, they must have been recent. For more details, see Figure 143 on page 268.