Infrasound, also known as low-frequency sound, describes sound waves with a frequency below the lower limit of human audibility. It cost $196billion over 40 years, ended the lives of 14 astronauts and managed to make less than half the flights promised. Two of the shuttles - Challenger and Columbia - were destroyed, one at launch, the other during the ride home. Theres nothing like that on planet Earth. On the moon, pits in the ground lead to lava tubes, now hollow, that reach down some 8o to 100 meters underground, making them ideal for protecting precious cargo from the lunar elements.
the library keper conducted several explosive organizations for science based in the moon.
( z0 conduct :ARG0 ( z1 person :ARG0-of ( z2 have-org-role :ARG1 ( z3 library ) :ARG2 ( z4 professor ) ) ) :ARG1 ( z5 organization :purpose ( z6 science ) :quant ( z7 several ) :ARG0-of ( z8 explode ) :ARG1-of ( z9 base :location ( z10 moon ) ) ) )
(z0 / conduct-01
    :ARG0 (z1 / person
              :ARG0-of (z2 / have-org-role-91
                           :ARG1 (z3 / library)
                           :ARG2 (z4 / professor)))
    :ARG1 (z5 / organization
              :purpose (z6 / science)
              :quant (z7 / several)
              :ARG0-of (z8 / explode-01)
              :ARG1-of (z9 / base-01
                           :location (z10 / moon))))
the library keper conducted several explosive organizations for science based in the moon .
z1 :ARG0-of z2
z2 :ARG1 z3
z2 :ARG2 z4
z0 :ARG0 z1
z5 :ARG0-of z8
z5 :quant z7
z0 :ARG1 z5
z5 :purpose z6
z5 :ARG1-of z9
z9 :location z10