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Image of the Day
Jef Akst | Dec 16, 2011
Researchers discover microbes in Oregon thriving in extreme, Mars-like conditions.
Arsenic Bug's Genome Sequenced
Bob Grant | Dec 7, 2011
Researchers have mapped out the DNA of what some scientists claim to be an arsenic loving bacterium.
Arsenic-Based Life, Open to Critique
Edyta Zielinska | Aug 10, 2011
A researcher is repeating the controversial experiments that suggested a bacterium used arsenic rather than phosphorus in its DNA—with the world watching.
Meteorite hints at life’s origins
Tia Ghose | Jun 9, 2011
As debate continues to swirl around arsenic-loving bacteria, a space rock yields new astrobiological clues.
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.