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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.
Ecosystem variability and early human habitats in eastern Africa.
Magill CR, Ashley GM, Freeman KH. Magill CR, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2013 Jan 22;110(4):1167-74. doi: 10.1073/pnas.1206276110. Epub 2012 Dec 24. Proc Natl Acad Sci U S A. 2013. PMID: 23267092 Free PMC article.
Water, plants, and early human habitats in eastern Africa.
Magill CR, Ashley GM, Freeman KH. Magill CR, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2013 Jan 22;110(4):1175-80. doi: 10.1073/pnas.1209405109. Epub 2012 Dec 24. Proc Natl Acad Sci U S A. 2013. PMID: 23267102 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.
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.
Late Archean rise of aerobic microbial ecosystems.
Eigenbrode JL, Freeman KH. Eigenbrode JL, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2006 Oct 24;103(43):15759-64. doi: 10.1073/pnas.0607540103. Epub 2006 Oct 16. Proc Natl Acad Sci U S A. 2006. PMID: 17043234 Free PMC article.
Viable cyanobacteria in the deep continental subsurface.
Puente-Sánchez F, Arce-Rodríguez A, Oggerin M, García-Villadangos M, Moreno-Paz M, Blanco Y, Rodríguez N, Bird L, Lincoln SA, Tornos F, Prieto-Ballesteros O, Freeman KH, Pieper DH, Timmis KN, Amils R, Parro V. Puente-Sánchez F, et al. Among authors: freeman kh. Proc Natl Acad Sci U S A. 2018 Oct 16;115(42):10702-10707. doi: 10.1073/pnas.1808176115. Epub 2018 Oct 1. Proc Natl Acad Sci U S A. 2018. PMID: 30275328 Free PMC article.
51 results