is to launch a 'priority' mission to explore mysterious mounds on the moon that have baffled scientists.The US space agency has unveiled plans for a rover to visit the Gruithuisen Domes, geological features which experts believe were formed by a sticky magma rich in silica, similar in composition to granite.On Earth, formations like these need oceans of liquid water and plate tectonics to form, but without such ingredients on the moon, experts are unsure how the domes formed and evolved over time.
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