NASA can't find the Mars rock sample that the Perseverance rover drilled — it mysteriously disappeared

NASA has spent nine years and about $2 billion in its quest to drill and store samples of Martian rocks. The Perseverance rover was poised Friday to finally make that happen. The rover picked a rock in an ancient Mars lake bed that could have once held alien life, and attempted to drill. But then something strange happened: The sample seems to have vanished.

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