Everyone knows the Earth has constantly evolved over the course of billions of years, and the natural landscapes we see today are unrecognisable from ones at various stages in our planet’s history.

It's the happiest time of the year — Fat Bear Week! This year's event takes place from Sept. 23-30, and Mashable will be following all the ursine activity. Katmai National Park and Preserve’s brown ...

A healthy ocean powers economies, nourishes over three billion people and supports millions of jobs. The World Bank Group promotes the sustainable use of marine resources and aims to restore the ocean ...

An emergency hospital at Camp Funston, Kansas, 1918. “Of the 12 men who slept in my squad room, 7 were ill at one time,” a soldier recalled. New Contributed Photographs Collection / otis historical ...