arsenic

Researchers recovered eight species from the salty, alkaline environment—increasing the known biodiversity of animals in the California lake five-fold.

Andean communities may have evolved the ability to metabolize arsenic, a trait that could be the first documented example of a toxic substance acting as an agent of natural selection in humans.

Researchers have discovered a transporter protein in rice that sequesters arsenic in vacuoles, preventing the toxic element from traveling into grains.

Two new studies conclusively prove "arsenic-based" bacteria hailed by NASA researchers as a new form of life needs phosphate after all.

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

Meet the species whose DNA has recently been sequenced.

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.