Scientists find increase in asteroid impacts on ancient Earth by studying the Moon

A team of scientists has determined the number of asteroid impacts on the Moon and Earth increased by two to three times starting around 290 million years ago. Previous theories held that there were fewer craters on both objects dating back to before that time because they had disappeared due to erosion. The new findings claim that there were simply fewer asteroid impacts during that earlier period.

from All Top News -- ScienceDaily https://www.sciencedaily.com/releases/2019/01/190117142042.htm