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.