The document summarizes an article about Gale Crater on Mars, which was the landing site of the Curiosity rover. Gale Crater is a 15,000 foot high impact site with rugged rock formations. Curiosity was sent to explore the crater to search for evidence that Mars could support life. The $2.5 billion mission is expected to last two years but Curiosity may continue exploring longer. Gale Crater was carefully chosen as the landing site after analyzing 60 options due to its potential for preserving organic compounds.