NASA’s Mars Reconnaissance Orbiter (MRO) has been surveying strange “spider-like” surface features on Mars for years, and now citizen scientists are helping the orbiter hone in on areas that require further investigation. These prominent surface features are found near Mars’ south pole, and are believed to be linked to seasonal changes. The planet’s polar ice caps thaw bottom-side first in the spring, causing carbon dioxide to build up and carve deep channels in the terrain, according to a statement from NASA.
http://www.space.com/34481-mars-spiders-citizen-scientists-investigation.html
