The first 'collisional family' has been spotted among objects in the Kuiper belt, which lies on the outskirts of the Solar System. The identification could provide useful constraints on the outer Solar System's history.
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Morbidelli, A. Portrait of a suburban family. Nature 446, 273–274 (2007). https://doi.org/10.1038/446273a
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DOI: https://doi.org/10.1038/446273a
