Rare earth may refer to:
Science and technology Astrobiology Rare Earth: Why Complex Life Is Uncommon in the Universe, a book by Peter Ward and Donald E. Brownlee Rare Earth hypothesis, the hypothesis that complex life in the universe is exceptionally rare, spawned by the book Chemistry and geology Rare-earth elements, a group of elements on the periodic table Rare-earth mineral, a mineral that contains one or more rare-earth elements as major metal constituents Rare-earth magnet, a type of magnet that employs rare earth elements to increase effectiveness
Music Rare Earth (band), an American musical group Rare Earth Records, a subsidiary of Motown Records which produced rock music