Posted by tourdemars to Meteorites at March 20, 2003 12:00 PM

Today at the Lunar and Planetary Science Conference in Houston Dr Jim Head presented new results to suggest that about one rock from Mars falls on Earth each month. Head’s work involves calculating exactly how often asteroids and comets impact with the planet Mars and how many martian rocks these collisions blast up into space. He then models the paths of these little fragments of the red planet, under the influence of the combined gravity of the planets and Sun to see how many and how often such martian meteorites fall to Earth.