Sulfates, where sulfur and oxygen bind with a cation, are also common; the gypsum used to make drywall boards and PVC pipes is calcium sulfate, for example. The abundance of sulfide and sulfate ...

NASA's Curiosity rover finds sulfur-rich crystals on Mars, hinting at ancient water and potential life-supporting conditions.

Sulfate-reducing bacteria break down a large ... "This results in the formation of foul-smelling hydrogen sulfide and the distinctive black iron sulfide precipitates," he explains.

Sulfate-reducing bacteria break down a large ... "This results in the formation of foul-smelling hydrogen sulfide and the distinctive black iron sulfide precipitates," he explains.