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Image of the Day
Jef Akst | Jan 17, 2014
Yet another genetic study of modern canines, both wild and domestic, supports the notion that humans domesticated dogs before growing crops.
Arsenic-based Life Challenged Again
Hannah Waters | Jan 24, 2012
An attempt to regrow the infamous GFAJ-1 bacteria, reported to incorporate arsenic into its DNA backbone, has failed.
Arsenic-based life debate continues
Jessica P. Johnson | Jun 3, 2011
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.