Catastrophe

Popocatépetl, Mexico's largest active volcano, sits next to some major population hubs. With a major eruption forecasted within the next 100 years, will the public be ready?

"Mass assault" may sound like a felony, but it's actually an exercise in mass healing.

A vicious dust storm ripped through northern India, causing chaos in the streets.

Researchers analyze mathematics of rapid change in complex systems and find room for improvement—and hints at mitigation.