“After an afternoon of hiking and exploring the caves of Rhossili Bay, West Glamorgan, we caught the sun breaking through the clouds”. (Photo by Megan Warren-Davis/The Guardian)

A huge colony of Pacific Walrus on Arakamchechen Island in the Northern Bering Sea. (Photo by Francois Gohier/Ardea/Caters News)

Araya A. Hargate, nickname Chompoo poses on the red carpet for the screening of the film “Les Miserables” during the 72nd annual Cannes Film Festival on May 15, 2019 in Cannes, France. (Photo by Stephane Mahe/Reuters)

Karima Adebibe, the newly crowned face of Lara Croft, poses, with a Burmese python on the eve of the release of the record breaking new video game “Lara Croft Tomb Raider; Legend” at The Barbican on April 6, 2006 in London, England. (Photo by Gareth Cattermole/Getty Images)

A reflection of the Alps mountain “Nordkette” is seen in the ski googles of Anders Bardal of Norway during the training round of the FIS Ski Jumping World Cup event at the 60th Four Hills ski jumping tournament at Bergisel on January 3, 2012 in Innsbruck, Austria. (Photo by Alexander Hassenstein/Bongarts/Getty Images)

This artist's scoreboard displays a fictional game between Mars and Earth, with Mars in the lead. It refers to the success rate of sending missions to Mars, both as orbiters and landers. Of the previous 39 missions targeted for Mars from around the world, 15 have been successes and 24 failures. For baseball fans, that's a batting average of .385. The United States has had 13 successes out of 18 attempts, or a “batting average” of .722. NASA's Curiosity rover, set to land on the Red Planet the evening of Aug. 5, 2012 PDT (morning of Aug. 6 EDT), will mark the United States' 19th attempt to tackle the challenge of Mars, and the world's 40th attempt. (Image by NASA/JPL-Caltech)