Get flash to fully experience Pearltrees
Lunar impacts created seas of molten rock, research shows <img src="http://cdn.physorg.com/newman/gfx/news/tmb/2013/lunarimpacts.jpg" alt="" align="left" width="90" height="90"/> Early in the Moon's history an ocean of molten rock covered its entire surface. As that lunar magma ocean cooled over millions of years, it differentiated to form the Moon's crust and mantle.
Comet Elenin's current position - Sept 3, 2011. JPL Michael E.
NAVY Space Command Uncovered