The greenish meteorite recently found in Morocco that some scientists say came from Mercury may not be from that tiny planet after all, other scientists caution.
The main issue is the rock's age. At 4.5 billion years old, some scientists question whether any rock from that early epoch could have survived the heavy bombardment that swept through the inner Solar System after that. Further tests may determine the rock's origin.
Monday, April 8, 2013
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