This image of a "red spot" on Mercury, which is thought to be the result of a volcanic explosion, was sent to Earth by the Messenger probe in 2011. NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington hide caption
This pair of Charlie Hebdo covers from 2012 pokes fun at the magazine's "irresponsible" approach to humor. AFP/AFP/Getty Images hide caption
An artist's rendition of the HD 7924 planetary system — just 54 light-years away from Earth — shows newly discovered exoplanets c and d, which join Planet b. Karen Termaura, BJ Fulton/UH IfA hide caption
A shape that could be an airplane is seen in a 3D sonar image (lower portion) of the USS Independence released by NOAA, which located the shipwreck in Monterey Bay National Marine Sanctuary. A team located the carrier during a maritime archaeological survey. NOAA, Boeing, and Coda Octopus hide caption
The SpaceX Dragon cargo capsule nears the International Space Station on Friday, as astronauts prepare to snag it with a robotic arm. NASA TV hide caption
A religious volume from the early 1300s includes this image of a monk who resembles the Jedi Master Yoda of the Star Wars films. The Britsh Library hide caption
Stephen Hawking flying through the universe in a new video of Monty Python's Galaxy Song. Monty Python/YouTube hide caption
Saturn has a rocky surface, but it's deep beneath the clouds. That makes it hard to tell exactly how long the day is. NASA hide caption
NASA astronaut Scott Kelly is seen inside a Soyuz simulator at the Gagarin Cosmonaut Training Center on March 4 in Star City, Russia. Kelly, along with Russian cosmonaut Mikhail Kornienko of the Russian Federal Space Agency, are scheduled for launch Friday aboard a Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan. NASA/Bill Ingalls hide caption
Cuban artist Tania Bruguera poses for a photograph near the statue of José Martí in Havana's Revolution Plaza. She was arrested in December for planning a political performance there. Eyder Peralta/NPR hide caption
Water molecules between two layers of graphene arranged themselves in a lattice of squares — unlike any other known form of ice. NPG Press via YouTube hide caption
This booking photo provided by the Orleans Parish Sheriff's Office shows Robert Durst, after his arrest Saturday in New Orleans on an extradition warrant to Los Angeles. AP hide caption