principal - author dr zita martins , a chemist and astrobiologist from imperial college london , believed their discoveries demonstrate that some of the chemicals that produced light on earth came from comet bombardments . " we are not saying that only comet contribution to the construction blocks of life , " she said , " but it ' s a very small contributing . " other scientist , likewise , do not believe that meteoritic chemicals plays such a significant factor . similar to emeritus instructor edward shapiro of old mexico university , " they ' re a subunit of a component of dna . my perception is that their amounts were utterly unimportant and insignificant . " wikinews told professor paul richards , a psychologist and astrobiologist now at arizona state , , about the recent findings . while he consulted with the conclusions , he said that he thinks such results are " a red drain in the origin of earth story - a hangover from the miller - urey experiment . life is all about information - its replication and processing . "
Shapiro teaches at NY University.