A rare meteorite recovered from the Sahara Desert contains the first definitive evidence of a long-lost world that may have rivaled the moon in size and existed just a few million years after the solar system formed 4.5 billion years ago, according to a new study.
The meteorite, known as Northwest Africa (NWA) 12774, is a roughly one-pound (454-gram) rock discovered in the Sahara Desert in 2019. Scientists classify it as an angrite, a rare type of meteorite that ranks among the oldest volcanic rocks in the solar system. This particular chunk of space rock, known as NWA 12774, preserves an unusual chemical signature that suggests some of the solar system's earliest worlds developed differently from other rocky planets, researchers say.
