Felisa Wolfe-Simon

Yet another genetic study of modern canines, both wild and domestic, supports the notion that humans domesticated dogs before growing crops.

An attempt to regrow the infamous GFAJ-1 bacteria, reported to incorporate arsenic into its DNA backbone, has failed.

More than a dozen researchers voice their concerns about a 2010 paper that claims bacteria can use arsenic in place of phosphorus in its DNA and other biomolecules, such as proteins.