Science enthusiasts around the world have a unique opportunity to help NASA learn more about Mars.

Science enthusiasts around the world have a unique opportunity to help NASA learn more about Mars. Members of NASA's Mars Reconnaissance Orbiter (MRO) science team are asking the public to help them categorize strange features near the Red Planet's south pole for further study and analysis.
Those who join the effort will review photos of the region captured by MRO's Context Camera (CTX), identifying areas that deserve more detailed scrutiny by the orbiter's High Resolution Imaging Science Experiment (HiRISE) camera. HiRISE has a resolution of about 20 inches (50 centimeters) per pixel, compared to 20 feet (6 m) per pixel for CTX, NASA officials said.
Volunteers should see some interesting features in the CTX images, thanks to the seasonal thawing and freezing of carbon-dioxide ice (also known as dry ice) in the Martian polar regions.
"In the spring, the dry ice turns to gas and carves unusual features in the Mars surface, resulting in exotic terrains described informally as 'spiders,' 'Swiss cheese' and 'channel networks,'" HiRISE deputy principal investigator Candice Hansen, of the Planetary Science Institute in Tucson, Arizona, said in a statement.
You can learn more about the project — including how to participate — at the "Planet Four: Terrains" website here: http://terrains.planetfour.org