NASA is considering two ways to get its precious Mars samples back to Earth, but the agency won't pick a winner for another 18 months or so.
Analysis of those samples, which are being collected by NASA's Perseverance rover, could reveal a wealth of data about Mars and its history — including, perhaps, whether the Red Planet has ever hosted life.
NASA is therefore eager to get the Mars material — about 30 cigar-sized, sealed tubes containing rock cores and sediment — home, and then on to laboratories around the world. But doing so has proven to be more difficult, and far more expensive, than originally envisioned.
Source: www.space.com
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