Earth organisms proved capable of thriving despite toxic Martian salts

Researchers from the University of Florida have demonstrated that certain Earth microorganisms can not only survive but actively grow in conditions simulating the subsurface environment of Mars. The study, published as a preprint on bioRxiv, shows that halophilic microbes are capable of development despite the presence of aggressive saline brines and toxic chemicals. The research focused on Haloferax volcanii, an extremophile typically found in hypersaline environments such as the Dead Sea. Previously, scientists believed the Martian environment was too hostile for active growth due to low atmospheric pressure, a lack of oxygen, and the presence of perchlorates—toxic compounds that function similarly to bleach. Adam Robinson, lead researcher: "We demonstrate that halophilic microorganisms are capable of active growth in a combination of an oxygen-free atmosphere, low pressure, and a liquid medium with high concentrations of salts and perchlorates. No one has managed to show this before."