Add Yahoo as a preferred source to see more of our stories on Google. A prototype of a Mars Sample Return rover at NASA's Jet Propulsion Laboratory in 2020. (Dania Maxwell / Los Angeles Times) The Jet ...

If NASA doesn't come up with a tighter budget for the mission, Mars Sample Return may not happen. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

The Jet Propulsion Laboratory laid off 100 contractors last week and will scale back part of the first-ever effort to bring pieces of Mars to Earth, after a cost-cutting order from NASA that lawmakers ...