What's so hard about counting craters?
St. Louis MO (SPX) Apr 08, 2014 - Providing a rare glimpse of the trade secrets of planetary scientists, the journal Icarus published a study this month that compared lunar crater counts by eight professionals with crowdsourced counts by volunteers. The professional crater counts varied by as much as a factor of two; some professionals counted twice as many craters as others. But the population of craters found by the volu ... more

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