For a long while it was taught that all of Earth's impact craters formed during the Late Heavy Bombardment, and that all trace of them had been eroded away, because Earth is unique etc. Turns out people just weren't looking for them, now nearly 200 have been identified and studied.
posted on 07/15/2012 7:52:29 PM PDT
Re same companion article posted on FR here:
Hung a few tags on it...
posted on 07/15/2012 8:17:07 PM PDT
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