You are currently viewing the summary.
View Full TextLog in to view the full text
AAAS login provides access to Science for AAAS members, and access to other journals in the Science family to users who have purchased individual subscriptions.
More options
Download and print this article for your personal scholarly, research, and educational use.
Buy a single issue of Science for just $15 USD.
Summary
Planetary scientists have begun to plan the first stage of a Mars sample return mission: a rover to be launched in 2020. Scientists want the rover to drill at least 31 rock samples weighing about 15 grams apiece during its 2-year mission and pack them in a cache that a later mission will retrieve. But the rover will have to work faster than the current rover, Curiosity, which has drilled just three samples in its 20 months on Mars.
