NASA weighs expense, risk of mission to seek Martian life Houston Chronicle

As NASA races to revamp its failed Mars exploration program, scientists are torn over how aggressively the agency should proceed with a risky and expensive robotic mission that could hasten the search for life on the Red Planet. On Thursday, more than 200 experts wrapped up three days of NASA-sponsored debate at the Lunar and Planetary Institute in Houston over how the agency should reshape its Mars exploration strategy in response to a pair of mission failures last year.