35, July 2000, pp. 30, No. 5, September 1995, p. 502. Although Cowen and Watson believe these meteorites came from Mars, page 253 explains why this is unlikely. Because meteorites are so similar to the material inside Earth, many researchers believe that the Earth formed from infalling meteoroids. One should also consider whether the Earth produced meteoroids.
Much evidence opposes the former.
Meteorites and probably all meteoroids contain the same materials as those contained in the earth itself. I'm stunned and astonished. Asphaug, p. 46. This site best viewed with Netscape 6 or Internet Explorer 5.5 or greater.