| http://www.w3.org/ns/prov#value | - The missing asteroids may be evidence of an event that took place about 4 billion years ago, when the solar system's giant planets migrated to their present locations.David A. Minton, University of Arizona planetary sciences graduate student, and Renu Malhotra, planetary sciences professor, say missing asteroids are an important piece of evidence to support an idea that the early solar system unde
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