By Klaus SchmidtPublished:20 August 2009 11:56 AM CEST Source MOFFETT FIELD, Calif., (NASA) — Humans might not be walking on Earth today if not for the ancient fusing of two microscopic, single-celled organisms called prokaryotes, NASA-funded research has found. By comparing proteins present in more than 3000 different prokaryotes – a type of single-celled organism without a nucleus – molecular biologist James A. Lake from the University of California at Los Angeles’ Center for Astrobiology sho

Tags: Astrobiology, Evolution Of Life, Evolution Of Life On Earth, Insight, Klaus, Life On Earth, Moffett Field, Molecular Biologist, Nasa, Nasa Research, Nucleus, Proteins, Single Celled Organism, Single Celled Organisms, University California, University Of California, University Of California At Los Angeles