Meteorites are the debris from space that survive to reach the surface of Earth. Meteorites are called finds or falls according to how they are discovered; the most productive source today is the Anta...Meteorites are the debris from space that survive to reach the surface of Earth. Meteorites are called finds or falls according to how they are discovered; the most productive source today is the Antarctic ice cap. Meteorites are classified as irons, stony-irons, or stones accordingly to their composition. Most stones are primitive objects, dated to the origin of the solar system. The most primitive are the carbonaceous meteorites that can contain a number of organic (carbon-rich) molecules.