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Reconstructing Earth's atmospheric oxygenation history using machine learning.
Chen G, Cheng Q, Lyons TW, Shen J, Agterberg F, Huang N, Zhao M. Chen G, et al. Among authors: lyons tw. Nat Commun. 2022 Oct 4;13(1):5862. doi: 10.1038/s41467-022-33388-5. Nat Commun. 2022. PMID: 36195593 Free PMC article.
We observe an overall two-step rise of atmospheric O(2) similar to the published curves derived from independent sediment-hosted paleo-oxybarometers but with a more detailed fabric of O(2) fluctuations superimposed. These additional, shorter-term fluctuations are also cons …
We observe an overall two-step rise of atmospheric O(2) similar to the published curves derived from independent sediment-hosted paleo-oxyba …
Absence of biomarker evidence for early eukaryotic life from the Mesoproterozoic Roper Group: Searching across a marine redox gradient in mid-Proterozoic habitability.
Nguyen K, Love GD, Zumberge JA, Kelly AE, Owens JD, Rohrssen MK, Bates SM, Cai C, Lyons TW. Nguyen K, et al. Among authors: lyons tw. Geobiology. 2019 May;17(3):247-260. doi: 10.1111/gbi.12329. Epub 2019 Jan 10. Geobiology. 2019. PMID: 30629323
The dearth of Mesoproterozoic eukaryotic sterane biomarkers, even within the more oxic facies, is somewhat surprising but suggests that controls such as the long-term nutrient balance and other environmental factors may have throttled the abundances and diversity of early …
The dearth of Mesoproterozoic eukaryotic sterane biomarkers, even within the more oxic facies, is somewhat surprising but suggests that cont …
Mid-Proterozoic redox evolution and the possibility of transient oxygenation events.
Diamond CW, Lyons TW. Diamond CW, et al. Among authors: lyons tw. Emerg Top Life Sci. 2018 Sep 28;2(2):235-245. doi: 10.1042/ETLS20170146. Emerg Top Life Sci. 2018. PMID: 32412618
In this review, we summarize the evidence for the prevailing long-term conditions of the Proterozoic Eon prior to the emergence of Metazoa and go on to highlight multiple independent geochemical proxy records that suggest at least two transient oxygenation events - at ca. …
In this review, we summarize the evidence for the prevailing long-term conditions of the Proterozoic Eon prior to the emergence of Me …
A Systematic Review and Meta-Analysis of the Management and Outcomes of Isolated Skull Fractures in Children.
Bressan S, Marchetto L, Lyons TW, Monuteaux MC, Freedman SB, Da Dalt L, Nigrovic LE. Bressan S, et al. Among authors: lyons tw. Ann Emerg Med. 2018 Jun;71(6):714-724.e2. doi: 10.1016/j.annemergmed.2017.10.014. Epub 2017 Nov 24. Ann Emerg Med. 2018. PMID: 29174834 Free PMC article.
STUDY OBJECTIVE: Most studies of children with isolated skull fractures have been relatively small, and rare adverse outcomes may have been missed. Our aim is to quantify the frequency of short-term adverse outcomes of children with isolated skull fractures. METHODS: PubMe …
STUDY OBJECTIVE: Most studies of children with isolated skull fractures have been relatively small, and rare adverse outcomes may have been …
False Negatives for Remote Life Detection on Ocean-Bearing Planets: Lessons from the Early Earth.
Reinhard CT, Olson SL, Schwieterman EW, Lyons TW. Reinhard CT, et al. Among authors: lyons tw. Astrobiology. 2017 Apr;17(4):287-297. doi: 10.1089/ast.2016.1598. Astrobiology. 2017. PMID: 28418704 Free PMC article.
Ocean-atmosphere chemistry on Earth has undergone dramatic evolutionary changes throughout its long history, with potentially significant ramifications for the emergence and long-term stability of atmospheric biosignatures. Though a great deal of work has centered on refin …
Ocean-atmosphere chemistry on Earth has undergone dramatic evolutionary changes throughout its long history, with potentially significant ra …
Earth's oxygen cycle and the evolution of animal life.
Reinhard CT, Planavsky NJ, Olson SL, Lyons TW, Erwin DH. Reinhard CT, et al. Among authors: lyons tw. Proc Natl Acad Sci U S A. 2016 Aug 9;113(32):8933-8. doi: 10.1073/pnas.1521544113. Epub 2016 Jul 25. Proc Natl Acad Sci U S A. 2016. PMID: 27457943 Free PMC article.
We argue that these effects, when considered in the light of synergistic interactions with other environmental parameters and variable O2 demand throughout an organism's life history, would have resulted in long-term evolutionary and ecological inhibition of animal life on …
We argue that these effects, when considered in the light of synergistic interactions with other environmental parameters and variable O2 de …
Long-term sedimentary recycling of rare sulphur isotope anomalies.
Reinhard CT, Planavsky NJ, Lyons TW. Reinhard CT, et al. Among authors: lyons tw. Nature. 2013 May 2;497(7447):100-3. doi: 10.1038/nature12021. Epub 2013 Apr 24. Nature. 2013. PMID: 23615613 Free article.
The generation and initial delivery of these anomalies to marine sediments requires low partial pressures of atmospheric O2 (p(O2); refs 2, 3), and the disappearance of NMD anomalies from the rock record 2.32 billion years ago is thought to have signalled a departure from persist …
The generation and initial delivery of these anomalies to marine sediments requires low partial pressures of atmospheric O2 (p(O2); refs 2, …
Geochemical evidence for widespread euxinia in the later Cambrian ocean.
Gill BC, Lyons TW, Young SA, Kump LR, Knoll AH, Saltzman MR. Gill BC, et al. Among authors: lyons tw. Nature. 2011 Jan 6;469(7328):80-3. doi: 10.1038/nature09700. Nature. 2011. PMID: 21209662
Widespread anoxia in the ocean is frequently invoked as a primary driver of mass extinction as well as a long-term inhibitor of evolutionary radiation on early Earth. In recent biogeochemical studies it has been hypothesized that oxygen deficiency was widespread in subsurf …
Widespread anoxia in the ocean is frequently invoked as a primary driver of mass extinction as well as a long-term inhibitor of evolu …