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RT @drcrater: @Cmdr_Aristotle - the Acasta Gniess was the oldest rock known for a long time at 4.03 billion years - https://t.co/ssJY6VUtya
RT @drcrater: @Cmdr_Aristotle - the Acasta Gniess was the oldest rock known for a long time at 4.03 billion years - https://t.co/ssJY6VUtya
@Cmdr_Aristotle - the Acasta Gniess was the oldest rock known for a long time at 4.03 billion years - https://t.co/ssJY6VUtya