More U.S. citizens are considering obtaining a passport for a second country, with two major routes open to them.

A new global atlas of underground fungi suggests that some surprising biodiversity hot spots lie hidden beneath our feet.

The Santa Ynez Chumash Museum and Cultural Center is an engaging dip into Chumash stories, traditions and even plants, but ...

A University of Kansas researcher has spent years studying "aquaterra"—his term for regions around the world once populated ...