Satellite view: NASA / ​ The Visible Earth (http: / / ​ visibleearth.nasa.gov /); divers: © Paul Duda / ​ Photo Researchers, Inc.
Satellite view: NASA / ​ The Visible Earth (http: / / ​ visibleearth.nasa.gov /); divers: © Paul Duda / ​ Photo Researchers, Inc.