A new paper argues that massive volcanism on the moon may have actually tilted its axis millions of years ago. This axial tilt would have impacted the distribution of ice at the lunar north and south pole -- and we see evidence of unusual variation that persists to this day.
from ExtremeTechExtremeTech http://www.extremetech.com/extreme/225418-massive-volcanoes-may-have-knocked-moons-axis-off-kilter
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