Ancient sediments that once resided on a lake bed and the ocean floor show sulfur isotope ratios unlike those found in other samples from the same time, calling into question accepted ideas about when ...

Sedimentary rocks created more than 2.4 billion years ago sometimes have an unusual sulfur isotope composition thought to be caused by the action of ultra violet light on volcanically produced sulfur ...

Analyses of ancient sulfide minerals and the modern organisms that create sulfides are giving scientists a better idea of what Earth’s atmosphere and oceans may have been like billions of years ago.

Life on Earth began in a world of volcanic eruptions, violent storms, and a toxic atmosphere. Yet somehow, from this chaos, ...

The heterogeneous reaction of thiols with lead oxide to form insoluble lead thiolates is the basis for a new process that separates thiols from a hydrocarbon stream. The process uses inexpensive ...