The volcano, called Axial Seamount, is more than 3,600-feet-tall and sits half a mile underwater just 300 miles off the coast ...

National-park reservations systems keep changing. Here's what to know this year—and how to be sure that you get them.

Researchers have shed new light on the role played by carbon dioxide in the warming and cooling of planet Earth. A team from the University of St Andrews used fossils to work out how much CO2 changed ...