Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...

As if fighting wildfires aren’t challenging enough, crown fires can make it even more challenging. Crown fires advance from the tops of the trees or shrubs, independent of the ground fire.

Global sea ice, which takes into account the sea ice total from both the Arctic and Antarctic polar regions, reached a new all-time minimum for February and stayed in record territory for the ...