Mars gets hit by hundreds of basketball-size space rocks every year CNNAnalysis of NASA InSight data suggests Mars hit by meteoroids more often than thought Phys.orgMars is an asteroid punching bag, NASA data reveals Space.comQuakes on Mars Reveal Red Planet Is Constantly Bombarded by Meteorites ScienceAlertAn estimate of the impact rate on Mars from statistics of very-high-frequency marsquakes Nature.com