Mars now has the best-known current rate of cratering
in the solar system," said HiRISE Principal Investigator Alfred McEwen of the University of Arizona, a co-author on the paper.
Anything that disperses the contaminant or causes it to adsorb on pigment will prevent or reduce cratering
The unusual element of this cratering
pair is the straight rim that separates the two (Figures 1-4).
record in the inner solar system changed dramatically after the initial violent era and indicates that most of the impactors since then have been near-Earth asteroids, less than 20 km across.
Ongoing debate over the causes of mass extinction events millions of years ago led to the innovative concept of the impact cratering
kill curve and an understanding of how impact events may affect evolution and environmental changes on Earth.