"The net result of the electrical imbalance will be the pulsation of the Earth (expansion-contraction), which is superimposed on its expansion." -- Stavros T. Tassos, seismologist, 1998
Science Daily: NASA's Lunar Reconnaissance Orbiter Reveals 'Incredible Shrinking Moon'.
ScienceDaily (Aug. 20, 2010) — Newly discovered cliffs in the lunar crust indicate the moon shrank globally in the geologically recent past and might still be shrinking today, according to a team analyzing new images from NASA's Lunar Reconnaissance Orbiter (LRO) spacecraft. The results provide important clues to the moon's recent geologic and tectonic evolution.