Talk:Panspermia/a critique of NASA researchers make first discovery of life's building block in comet

Glycine could have been created separately on Earth as well
The glycine found in the comet was composed with carbon-13, so yes, there is glycine in space. However, this does not prove that all glycine on earth originated in space. It could have been created separately on Earth using carbon-12. PolkaDots576 01:54, 1 February 2012 (UTC)

Actually, it does prove that glycine on the earth originated in space. The carbon 13 atoms in the molecules of glycine from space were heavier than the ones found on Earth. This is how NASA scientists discovered glycine in a cometDesi diva007 (talk) 02:51, 21 November 2012 (UTC).