A study just published reveals the moon experienced a dramatic increase in cratering rates about 300 million years ago. This corroborates evidence of a similar increase in Earth impacts.
The paper is: The Earth and Moon impact flux increased at the end of the Paleozoic
Sara Mazrouei, Rebecca R. Ghent, William F. Bottke, Alex H. Parker, Thomas M. Gernon
DATA BY MAZROUEI ET ALL (SCIENCE 2019; VIDEO BY SYSTEM SOUNDS
Special thanks to Prof. David Paige