According to the Meteoritical Society, more than 30,000 meteorities have been identified. (Meteorites are the interstellar rocks that make it through our atmosphere and land on Earth.) Most of them come from the rocky debris (like asteroids and comets) floating through space, but a few dozen are believed to have originated on Mars or the moon.
Or Mercury? (What, can anomalous meteorites only come from places the begin with the letter “M�)
In a new paper submitted to the journal Meteoritics and Planetary Science, two Canadian astronomers crunch the numbers and find that we should expect Mercury-borne meteorites to strike the Earth at roughly half the rate of those from Mars. In other words, there might already be a few pieces of Mercury here on Earth.
