2013051820130518000020130519/az/hprichbg/rb/USSSanFrancisco_EN-US5697494616_1366x768.jpg/az/hprichbg/rb/USSSanFrancisco_EN-US5697494616The USS San Francisco (SSN-711) at sea (© Steve Kaufman/Corbis)http://www.bing.com/search?q=USS+San+Francisco+SSN-711&form=hpcapt111The first submersibles were propelled by oars.http://www.bing.com/search?q=Los+Angeles-class+submarine&form=hphot1This one's a little more high-tech1134Five U.S. military branches serve our country on land, at sea, and in the air.http://www.bing.com/search?q=Armed+Forces+Day&form=hphot2Today's observance celebrates them all3739No denying, spending long periods of time under the sea can be challenging.http://www.bing.com/videos/search?q=life+on+a+nuclear+submarine&view=detail&mid=14B268C40CFF67AA897C14B268C40CFF67AA897C&first=1&FORM=hphot3How do submariners do it?5837Why power a sub with a nuclear reactor?http://www.bing.com/videos/search?q=Nuclear+sub&view=detail&mid=96E4851AA0B95F01738D96E4851AA0B95F01738D&first=0&FORM=hphot4What a great subject for a documentary...90412013051720130517000020130518/az/hprichbg/rb/JotunheimNorway_EN-US10105475164_1366x768.jpg/az/hprichbg/rb/JotunheimNorway_EN-US10105475164A lake in Jotunheimen National Park, Norway (© Sylvestre Popinet/Christel Freidel/Minden Pictures)http://www.bing.com/search?q=Jotunheimen+National+Park&form=hpcapt111Somewhere in the shadows of Galdhøpiggen and Glittertind, you'll find this little lake.http://www.bing.com/images/search?q=Jotunheimen+Norway&FORM=hphot1What else will you see here?1946Welcome to the middle world of the mythological Norse universe.http://www.bing.com/search?q=Jotunheim+%22Land+of+the+Giants%22&form=hphot2But everyone just calls it Land of the Giants4136Today, people in this country are celebrating Nasjonaldagen!http://www.bing.com/search?q=Norway+Constitution+Day&form=hphot3And here's that translation...6740This mountain range features more tall peaks than anywhere else in Scandinavia.http://www.bing.com/maps/?v=2&cp=61.536230~8.609119&lvl=10&dir=0&sty=b&where1=Jotunheimen%2C%20Norway&form=hphot4Take a look from on high83492013051620130516000020130517/az/hprichbg/rb/ReefView_EN-US7117755022_1366x768.jpg/az/hprichbg/rb/ReefView_EN-US7117755022Aerial view of the Great Barrier Reef, Queensland, Australia (© Grant Faint/Getty Images)http://www.bing.com/search?q=Great+Barrier+Reef&form=hpcapt111You're looking at the only living thing on Earth that's so big…http://www.bing.com/search?q=Great+Barrier+Reef&form=hphot1It can be seen from space1141This “underwater city” stretches for 1,200 miles along the shore.http://www.bing.com/videos/search?q=Great+Barrier+Reef+National+Geographic&view=detail&mid=0BC8BA36AD02B352D4D80BC8BA36AD02B352D4D8&first=0&form=hphot2Take a closer look at the inhabitants4649See the reef from 14,000 feet...http://www.bing.com/images/search?q=skydive+mission+beach+australia&form=hphot3And falling6042Visit this photogenic corner of the planet and you're bound to get some great pics.http://www.bing.com/images/search?q=Great+Barrier+Reef&FORM=hphot4Just don't forget your underwater camera77402013051520130515000020130516/az/hprichbg/rb/DeathStar_EN-US10797398820_1366x768.jpg/az/hprichbg/rb/DeathStar_EN-US10797398820The planet Mercury (© NASA)http://www.bing.com/search?q=Planet+Mercury&form=hpcapt111A robotic spacecraft called the “Messenger” is currently exploring this battered sphere.http://www.bing.com/search?q=Planet+Mercury+%28Roman+Messenger%29&form=hphot1You might know the planet's name if you're up on your Roman mythology1836Will traveling to space...http://www.bing.com/videos/search?q=space+travel&view=detail&mid=B92103C254B94425C70DB92103C254B94425C70D&first=121&FORM=hphot2Make us better people?3545If you're a famous artist, you could have a crater on this planet named after you.http://www.bing.com/search?q=Mercury+craters+(artist+names)&FORM=hphot3Unfortunately, you'll first need to leave this world behind (sorry)6844You may not be able to travel here yet.http://www.bing.com/videos/search?q=Mercury%2c+The+Winged+Messenger+(The+Planets)&view=detail&mid=87CDD5D8B8F962CAF65087CDD5D8B8F962CAF650&first=0&FORM=hphot4However, you're welcome to listen to it right now8549Loading...PreviousNextPlayPause