Mercury in Rain Increasing in Western and Central United States: Despite tightening emissions rules, mercury concentrations are rising in rainfall wetting western and central regions of the United States

The presence of ammonia-rich clay on much of the surface of Ceres suggests that this dwarf planet—the largest object in the asteroid belt—may have formed far out in the solar system…

A presumed pause in the rise of Earth’s average global surface temperature might never have happened

When the sun goes quiet, Titan gets gassy

Traces of glass-eating microbes found in ancient lake bed on Earth could aid in the discovery of life on Mars.