Rosie Redfield has a “must read” post, Arsenic-associated bacteria (NASA’s claims). I won’t excerpt it, read the whole thing. To me it is very interesting that many pieces of her critique are ones I’ve encountered in emails or Facebook postings. She stitches them together into a coherent whole. She’ll be writing a letter to Science. Hopefully they’ll publish it. Even if you don’t have a deep background in microbiology and biochemistry I think it was clear that the authors jumped had jumped to some inferences too quickly.
(Acknowledgement, John Hawks)