> during pluto's formative years? I believe they're saying that this is not the case since they've seen fewer craters on Pluto than they would have expected, w

> during pluto's formative years? I believe they're saying that this is not the case since they've seen fewer craters on Pluto than they would have expected, which makes them think these mountains are relatively 'recent' formations (that would have hidden any older craters that were present).