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Our data indicate that the Chicxulub impactor was a carbonaceous-type asteroid, which had formed beyond the orbit of Jupiter. The five other impact structures have isotopic signatures that are more consistent with siliceous-type asteroids, which formed closer to the Sun. The ancient spherule layer samples are consistent with impacts of carbonaceous-type asteroids during Earth\u2019s final stages of accretion.<\/jats:p>","DOI":"10.1126\/science.adk4868","type":"journal-article","created":{"date-parts":[[2024,8,15]],"date-time":"2024-08-15T13:58:56Z","timestamp":1723730336000},"page":"752-756","update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":34,"title":["Ruthenium isotopes show the Chicxulub impactor was a carbonaceous-type asteroid"],"prefix":"10.1126","volume":"385","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6839-9001","authenticated-orcid":true,"given":"Mario","family":"Fischer-G\u00f6dde","sequence":"first","affiliation":[{"name":"Institut f\u00fcr Geologie und Mineralogie, University of Cologne, 50674 Cologne, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7492-8037","authenticated-orcid":true,"given":"Jonas","family":"Tusch","sequence":"additional","affiliation":[{"name":"Institut f\u00fcr Geologie und Mineralogie, University of Cologne, 50674 Cologne, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6666-7153","authenticated-orcid":true,"given":"Steven","family":"Goderis","sequence":"additional","affiliation":[{"name":"Archeology, Environmental Changes and Geochemistry Research Group, Vrije Universiteit Brussel, 1050 Brussels, Belgium."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4216-5025","authenticated-orcid":true,"given":"Alessandro","family":"Bragagni","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences, University of Florence, 50121 Firenze, Italy."},{"name":"Institute of Marine Sciences, National Research Council, 40129 Bologna, Italy."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tanja","family":"Mohr-Westheide","sequence":"additional","affiliation":[{"name":"Museum f\u00fcr Naturkunde, Leibniz-Institut f\u00fcr Evolutions- und Biodiversit\u00e4tsforschung, 10115 Berlin, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0977-4689","authenticated-orcid":true,"given":"Nils","family":"Messling","sequence":"additional","affiliation":[{"name":"Geochemistry and Isotope Geology Department, Geoscience Center, University of G\u00f6ttingen, 37073 G\u00f6ttingen, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0548-772X","authenticated-orcid":true,"given":"Bo-Magnus","family":"Elfers","sequence":"additional","affiliation":[{"name":"Zentrallabor, Technical University Hamburg, 21073 Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Birger","family":"Schmitz","sequence":"additional","affiliation":[{"name":"Astrogeobiology Laboratory, Lund University, SE-22100 Lund, Sweden."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wolf U.","family":"Reimold","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Geocronologia e Geoqu\u00edmica Isot\u00f3pica, Instituto de Geoci\u00eancias, Universidade de Bras\u00edlia, CEP 70910-900 Bras\u00edlia, DF, Brazil."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wolfgang D.","family":"Maier","sequence":"additional","affiliation":[{"name":"School of Earth and Ocean Sciences, Cardiff University, Cardiff CF10 3AT, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4585-7687","authenticated-orcid":true,"given":"Philippe","family":"Claeys","sequence":"additional","affiliation":[{"name":"Archeology, Environmental Changes and Geochemistry Research Group, Vrije Universiteit Brussel, 1050 Brussels, Belgium."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5155-7405","authenticated-orcid":true,"given":"Christian","family":"Koeberl","sequence":"additional","affiliation":[{"name":"Department of Lithospheric Research, University of Vienna, A-1090 Vienna, Austria,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6622-2907","authenticated-orcid":true,"given":"Fran\u00e7ois L. 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