The solar boat Antwerp Maritime Academy from Belgium passes the village Kimswerd during the Dong Energy Solar Challenge in Leeuwarden, the Netherlands, July 13. During the fourth edition of the six-day solar-sailing race, boats will pass the province Friesland. The route of the race is the same as the well known ice-skating race past the eleven Frisian cities, the Elfstedentocht.

The solar boat Midnight Sun from Finland passes the village Kimswerd during the Dong Energy Solar Challenge in Leeuwarden, the Netherlands, July 13.

Russian space agency rescue team members carry U.S. astronaut Donald Pettit shortly after the landing of the Russian Soyuz TMA-03M space capsule at the southeast of the Kazakh town of Dzhezkazgan, Kazakhstan, July 1.

The Swiss sun-powered aircraft Solar Impulse takes off on May 24, in Payerne on its first attempted intercontinental flight from Switzerland to Morocco. Solar Impulse, piloted by Andre Borschberg, is expected to land in Madrid for a stopover before heading to Morocco without using a drop of fuel. Bertrand Piccard will pilot the second leg on to Rabat, scheduled to leave Madrid on May 28 at the earliest.

The president of the Swiss sun-powered aircraft Solar Impulse project, Bertrand Piccard, helps pilot Andre Borschberg prepare for takeoff on May 24, in Payerne on its first attempted intercontinental flight from Switzerland to Morocco.

The Swiss sun-powered aircraft Solar Impulse prepares for takeoff on May 24, in Payerne on its first attempted intercontinental flight from Switzerland to Morocco.

The full moon rises behind the Temple of Poseidon in Cape Sounion, southeast of Athens, Greece, while tourists watch on May 5. Saturday's event is a "supermoon," the closest and therefore the biggest and brightest full moon of the year.

The moon rises over the skyline in Toronto, Canada, May 5.

A full moon is seen behind the minaret of Mohamed Ali mosque, in Islamic Cairo, Egypt, May 5.

An emperor penguin colony near Halley Bay in Antarctica in an undated satellite image.

Emperor penguins are seen in Dumont d'Urville, Antarctica, on April 10, 2012.

The satellite that North Korean officials say will be launched with the country's Unha-3 rocket, slated for liftoff between April 12-16, is shown to the media at Sohae Satellite Station in Tongchang-ri, North Korea on April 8. North Korean space officials have moved a long-range rocket into position for this week's controversial satellite launch, vowing Sunday to push ahead with their plans in defiance of international warnings against violating a ban on missile activity.

North Korean technicians work in the control room of the Tongchang-ri space center on April 8.

A North Korean waitress serves packaged meals for lunch on a train heading to North Phyongan Province, 35 miles south of the border town of Sinuiju along North Korea's west coast, April 8. North Korean officials escorted a group of international media by train from Pyongyang to see the country's Unha-3 rocket, slated for liftoff between April 12-16, at Sohae Satellite Station in Tongchang-ri, North Korea.

A North Korean soldier stands at a check point seen from a train heading to North Phyongan Province.

A conductor displays flag signals to a passing-by train outside a station featuring a portrait of North Korean founder Kim Il Sung northwest of Pyongyang, April 8.

The North Korean Unha-3 rocket is pictured at Tangachai -ri space center on April 8.

An electron microscope photograph shows a nano-scale F1 racing car model created by a newly developed 3D printing technique for nano structures, made available to Reuters March 29, 2012. Researchers from the Vienna University of Technology have set a new world speed record for creating 3D nano objects. The University team creates their grain of sand-size structures in just four minutes, a fraction of the time that other items have previously been printed. Making complex large 3D structures in the past would take hours or even days but with the newly developed 3D laser printer, the scientists can speed that up by a factor of 500 or in some cases 1,000 times. The process called "two-photon lithography" involves using a focused laser beam to harden liquid resin in order to create micro objects of solid polymer. The scientists said the technique could be developed to make small biomedical parts to be used by doctors.

A handout electron microscope photograph shows a nano-scale model of London's Tower Bridge.

An electron microscope photograph shows a nano-scale model of Vienna's St. Stephans cathedral created by a newly developed 3D printing technique for nano structures, made available to Reuters March 29.

Christof Wallner, 23, from Austria, the first buyer of the new iPad in Germany, poses after purchasing the tablet in front of the Apple store in Munich, March 16, 2012. Apple's new iPad went on a sale in Germany on Friday and more than 500 people waited on the line to purchase the new device in front of the shop prior to its opening.

The Confederate submarine H.L. Hunley sits in a conservation tank after a steel truss that had surrounded it was removed on Thursday.

The first clear view of the sub since it sank in 1864 off the South Carolina coast.