Moon model: a superplume from inside the Moon when it was just 500 million years old might explain a lot - and not just about the Moon (Pic: University of California). A mighty 'burp' early in the Moon's life may explain something that has puzzled scientists ever since Apollo astronauts brought back rock samples; why are there so many ancient magnetised rocks lying on the surface? Research published in the journal Nature this week from the University of California at Berkeley, in the United States, suggests that an expunged column of hot rock - like a blob rising to...