Local asteroid Bennu used to be filled with tiny rivers

NASA sent a spacecraft—the Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (or OSIRIS-REx for short)—to the asteroid Bennu. This space rock has gone relatively untouched since the formation of the solar system, so studying it could provide a window to those early days and help us better understand the origins of life as we know it.
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