Students pose for a photo with a globe during a campaign to mark World Earth Day in a middle school in Dexing, Jiangxi Province, China on April 19. World Earth Day falls on April 22 every year.
Astronaut John Glenn, Jr. enters into the spacecraft Friendship 7 prior to MA-6 launch operations at Launch Complex 14. Astronaut Glenn is entering his spacecraft to begin the first American manned Earth orbital mission.
Indians celebrate after their team won the ICC World Cup cricket semifinal match against Pakistan, in Mumbai, India. India upstaged archrival Pakistan by 29 runs in the so-called 'mother of all World Cup matches' to progress to the final against Sri Lanka, giving Sachin Tendulkar another chance to reach his 100th hundred after his charmed innings fell just short on Wednesday.
Alberta skip Kevin Martin throws a rock against Saskatchewan during the 12th draw at the Brier curling championships in London, Ontario, Canada.
The Space Shuttle Discovery is ready for its final flight to the International Space Station Thursday, say NASA officials.
In this image provided by NASA, the Space Shuttle Discovery is seen from the International Space Station as the two orbital spacecraft accomplish their relative separation on March 7, after an aggregate of 12 astronauts and cosmonauts worked together for over a week. The area below is the southwestern coast of Morocco in the northern Atlantic.
A float depicting President Obama with his hat topped off by a man dressed as AlQaeda leader Osama bin Laden, entitled 'Barack-Adabra and the Great Circus of the Fleas' is shown at the traditional carnival parade in Viareggio, Italy, Sunday.
Mars’ northern-most sand dunes are seen as they begin to emerge from their winter cover of seasonal carbon dioxide (dry) ice in this image acquired by the HiRISE camera aboard NASA's Mars Reconnaissance Orbiter Jan. 16, 2014. The steeply sides of the dunes are also ice-free along the crest, allowing sand to slide down the dune. Dark splotches are places where ice cracked earlier in spring, releasing sand.
The head of Russia's Space Forces hinted that Russia may develop a space plane similar to the US Air Force's secretive unmanned X-37B, which was sucessfully flight-tested last year.
National Aeronautics and Space Administration (NASA) administrator Charles Bolden lays a wreath at a Challenger memorial at Arlington National Cemetery in Arlington, Va., on Jan. 27, in commemoration of NASA's National Day of Remembrance. Jan. 28 marks the 25th anniversary of the explosion of the space shuttle Challenger, which killed seven astronauts in 1986.