Clark has suggested that homochirality may have started in outer space, as the studies of the amino acids on the Murchison meteorite showed that L-alanine is more than twice as frequent as its D form, and L-glutamic acid was more than three times prevalent than its D counterpart.
Clark je predložio da je homokiralnost mogla početi u svemiru budući da su studije aminokiselina na Murchison meteoritu pokazale da je L-alanin dvaput češći od D oblika te da je L-glutaminska kiselina triput češća od svojeg D oblika.