The ingenuity (and accumulated knowledge) of people never stops amazing me. "Well, we can't actually drill into Mars to see what it's made of, so let's slap a marsquake detector on the surface and we'll measure seismic energy from meteor impacts to figure out what this bad boy's guts are made of." Of course no NASA person actually talks like this; I have been reading too much Heinlein.
Also, they use the term "marsquake". Never stopped to think about how geocentric the term "earthquake" is!
Also, they use the term "marsquake". Never stopped to think about how geocentric the term "earthquake" is!