Why does Mercury have such a big iron core? Magnetism!

ScienceDaily
Jul 2, 2021, 3:43 pm129 pts
A new study disputes the prevailing hypothesis on why Mercury has a big core relative to its mantle. For decades, scientists argued that hit-and-run collisions blew away much of Mercury's rocky mantle and left the big, dense, metal core inside. But new research reveals that collisions are not to blame --…

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