Published in
American Association for the Advancement of Science, Science, 6450(365), 2019
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Comment on “Earth and Moon impact flux increased at the end of the Paleozoic”
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Abstract
Mazrouei et al . (Reports, 18 January 2019, p. 253) found a nonuniform distribution of crater ages on Earth and the Moon, concluding that the impact flux increased about 290 million years ago. We show that the apparent increase on Earth can be explained by erosion, whereas that on the Moon may be an artifact of their calibration method.