sparge: you're correct - tides pulled by the moon happen twice a day, and are stronger during full (and new) moons than at other times. This is exactly the same process that causes tides in the sea, but the effects on solids are obviously smaller than those on liquids.

george: individual cosmic rays can have energies higher than those of individual protons in the LHC. Strictly, the energy _density_ in the LHC is higher, but this isn't related to the nature of the collisions, only how often they happen.