The Mars Sample Return program has been way over budget and, according to NASA's administrator, has been "out of control." Now, the agency is exploring new options to get its Martian rock and dust samples back home to Earth.

NASA will investigate two new approaches to bring its Mars samples to Earth through a mission proposal that is less expensive and technically complicated. The space agency will flesh out options that could either involve using a commercial lander,

Anyone hoping for a clear path forward this year for NASA's imperiled Mars Sample Return mission will have to wait a little longer.