NASA’s Perseverance Mars rover has collected and stored the first samples of Martian rock for later return to Earth, but exactly when those samples will arrive on Earth remains uncertain.
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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The... More by Jeff Foust