California residents struggle to deal with worrisome 'clingy smell' in their homes: 'You probably need a professional'

In that respect, there might not even be a "clingy smell" to alert residents to potentially dangerous indoor conditions.

Team studies Mexico’s most eruption-prone volcano

In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions of people. Its mission: figure ...