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Page 1
Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium.
Zeichner SS, Aponte JC, Bhattacharjee S, Dong G, Hofmann AE, Dworkin JP, Glavin DP, Elsila JE, Graham HV, Naraoka H, Takano Y, Tachibana S, Karp AT, Grice K, Holman AI, Freeman KH, Yurimoto H, Nakamura T, Noguchi T, Okazaki R, Yabuta H, Sakamoto K, Yada T, Nishimura M, Nakato A, Miyazaki A, Yogata K, Abe M, Okada T, Usui T, Yoshikawa M, Saiki T, Tanaka S, Terui F, Nakazawa S, Watanabe SI, Tsuda Y, Hamase K, Fukushima K, Aoki D, Hashiguchi M, Mita H, Chikaraishi Y, Ohkouchi N, Ogawa NO, Sakai S, Parker ET, McLain HL, Orthous-Daunay FR, Vuitton V, Wolters C, Schmitt-Kopplin P, Hertkorn N, Thissen R, Ruf A, Isa J, Oba Y, Koga T, Yoshimura T, Araoka D, Sugahara H, Furusho A, Furukawa Y, Aoki J, Kano K, Nomura SM, Sasaki K, Sato H, Yoshikawa T, Tanaka S, Morita M, Onose M, Kabashima F, Fujishima K, Yamazaki T, Kimura Y, Eiler JM. Zeichner SS, et al. Among authors: freeman kh. Science. 2023 Dec 22;382(6677):1411-1416. doi: 10.1126/science.adg6304. Epub 2023 Dec 21. Science. 2023. PMID: 38127762
Recommendation on Orbiting Sample Cleanliness.
Cockell CS, Chitale R, Clement B, Davila A, Freeman KH, French KL, Glavin DP, Hays LE, Hummel K, Meyer MA, Pratt LM, Salvo C, Seasly E, Tsang KW. Cockell CS, et al. Among authors: freeman kh. Astrobiology. 2022 Jun;22(S1):S238-S241. doi: 10.1089/AST.2021.0058. Epub 2022 May 19. Astrobiology. 2022. PMID: 34904891
Organic matter from the Chicxulub crater exacerbated the K-Pg impact winter.
Lyons SL, Karp AT, Bralower TJ, Grice K, Schaefer B, Gulick SPS, Morgan JV, Freeman KH. Lyons SL, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2020 Oct 13;117(41):25327-25334. doi: 10.1073/pnas.2004596117. Epub 2020 Sep 28. Proc Natl Acad Sci U S A. 2020. PMID: 32989138 Free PMC article.
Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean, 1.7 Ma.
Sistiaga A, Husain F, Uribelarrea D, Martín-Perea DM, Ferland T, Freeman KH, Diez-Martín F, Baquedano E, Mabulla A, Domínguez-Rodrigo M, Summons RE. Sistiaga A, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2020 Oct 6;117(40):24720-24728. doi: 10.1073/pnas.2004532117. Epub 2020 Sep 15. Proc Natl Acad Sci U S A. 2020. PMID: 32934140 Free PMC article.
The first day of the Cenozoic.
Gulick SPS, Bralower TJ, Ormö J, Hall B, Grice K, Schaefer B, Lyons S, Freeman KH, Morgan JV, Artemieva N, Kaskes P, de Graaff SJ, Whalen MT, Collins GS, Tikoo SM, Verhagen C, Christeson GL, Claeys P, Coolen MJL, Goderis S, Goto K, Grieve RAF, McCall N, Osinski GR, Rae ASP, Riller U, Smit J, Vajda V, Wittmann A; Expedition 364 Scientists. Gulick SPS, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2019 Sep 24;116(39):19342-19351. doi: 10.1073/pnas.1909479116. Epub 2019 Sep 9. Proc Natl Acad Sci U S A. 2019. PMID: 31501350 Free PMC article.
Grassland fire ecology has roots in the late Miocene.
Karp AT, Behrensmeyer AK, Freeman KH. Karp AT, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2018 Nov 27;115(48):12130-12135. doi: 10.1073/pnas.1809758115. Epub 2018 Nov 14. Proc Natl Acad Sci U S A. 2018. PMID: 30429316 Free PMC article.
51 results