Congress commissioned the National Research Center to put together a report to find out what it would take to put humans on Mars. The 285-page report made a trip sound risky and expensive, but worth ... more 
Congress commissioned the National Research Center to put together a report to find out what it would take to put humans on Mars. The 285-page report made a trip sound risky and expensive, but worth it in the end. less 
1 / 6
TouchVision
Thu, Jun 5, 2014 5:12 AM EDT