Serious biologists were very skeptical from the start : http://omicsomics.blogspot.com/2010/12/arsenic-and-new-microbes.html http://omicsomics.blogspot.com/2010

Serious biologists were very skeptical from the start : http://omicsomics.blogspot.com/2010/12/arsenic-and-new-microbes.html http://omicsomics.blogspot.com/2010/12/arsenic-and-new-micro... Soon, there were lots of questions : http://pipeline.corante.com/archives/2011/06/01/return_of_the_arsenic_bacterium.php http://pipeline.corante.com/archives/2011/06/01/return_of_th... I'm thinking NASA is good at space exploration, not so good at biology.