Meteorites are messengers from the depths of primordial time, cast-off fragments of asteroids and comets. But their messages are often muddled by their final, fateful encounter with Earth.
NASA's Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft dove down to the surface of the near-Earth asteroid Bennu and retrieved rocks dating back 4.5 billion years before bringing them back to Earth last September.
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