James William Schopf

Title(s)Professor Emeritus, Earth, Planetary, and Space Sciences
SchoolCollege of Letters and Science
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    1. Deep-UV Raman Spectroscopy of Carbonaceous Precambrian Microfossils: Insights into the Search for Past Life on Mars. Astrobiology. 2022 10; 22(10):1239-1254. Osterhout JT, Schopf JW, Kudryavtsev AB, Czaja AD, Williford KH. PMID: 36194869.
      View in: PubMed   Mentions: 1     Fields:    
    2. SIMS analyses of the oldest known assemblage of microfossils document their taxon-correlated carbon isotope compositions. Proc Natl Acad Sci U S A. 2018 01 02; 115(1):53-58. Schopf JW, Kitajima K, Spicuzza MJ, Kudryavtsev AB, Valley JW. PMID: 29255053; PMCID: PMC5776830.
      View in: PubMed   Mentions: 35     Fields:    Translation:Cells
    3. Reconstructed ancestral enzymes suggest long-term cooling of Earth's photic zone since the Archean. Proc Natl Acad Sci U S A. 2017 05 02; 114(18):4619-4624. Garcia AK, Schopf JW, Yokobori SI, Akanuma S, Yamagishi A. PMID: 28416654; PMCID: PMC5422769.
      View in: PubMed   Mentions: 13     Fields:    Translation:AnimalsCellsPHPublic Health
    4. Reply to Dvořák et al.: Apparent evolutionary stasis of ancient subseafloor sulfur cycling biocoenoses. Proc Natl Acad Sci U S A. 2015 May 19; 112(20):E2560. Schopf JW, Kudryavtsev AB, Walter MR, Van Kranendonk MJ, Williford KH, Kozdon R, Valley JW, Gallardo VA, Espinoza C, Flannery DT. PMID: 25902537; PMCID: PMC4443316.
      View in: PubMed   Mentions:    Fields:    Translation:Cells
    5. Sulfur-cycling fossil bacteria from the 1.8-Ga Duck Creek Formation provide promising evidence of evolution's null hypothesis. Proc Natl Acad Sci U S A. 2015 Feb 17; 112(7):2087-92. Schopf JW, Kudryavtsev AB, Walter MR, Van Kranendonk MJ, Williford KH, Kozdon R, Valley JW, Gallardo VA, Espinoza C, Flannery DT. PMID: 25646436; PMCID: PMC4343172.
      View in: PubMed   Mentions: 14     Fields:    Translation:Cells
    6. Evidence of compositional and ultrastructural shifts during the development of calcareous tubes in the biofouling tubeworm, Hydroides elegans. J Struct Biol. 2015 Mar; 189(3):230-7. Chan VB, Vinn O, Li C, Lu X, Kudryavtsev AB, Schopf JW, Shih K, Zhang T, Thiyagarajan V. PMID: 25600412.
      View in: PubMed   Mentions: 2     Fields:    Translation:AnimalsCellsPHPublic Health
    7. Where do we go from here? Astrobiology editorial board opinions. Astrobiology. 2014 Aug; 14(8):629-44. Cady LP, Brack A, Bueno Prieto JE, Cockell C, Horneck G, Kasting JF, Lineweaver CH, Raulin F, Schopf JW, Sleep N, von Bloh W, Westall F, Deamer D, Lehman N, Pérez-Mercader J. PMID: 25102138.
      View in: PubMed   Mentions: 1     Fields:    
    8. Geological evidence of oxygenic photosynthesis and the biotic response to the 2400-2200 ma "great oxidation event". Biochemistry (Mosc). 2014 Mar; 79(3):165-77. Schopf JW. PMID: 24821442.
      View in: PubMed   Mentions: 12     Fields:    Translation:Cells
    9. Characterization of the stem anatomy of the Eocene fern Dennstaedtiopsis aerenchymata (Dennstaedtiaceae) by use of confocal laser scanning microscopy. Am J Bot. 2013 Aug; 100(8):1626-40. Shi CS, Schopf JW, Kudryavtsev AB. PMID: 23926220.
      View in: PubMed   Mentions: 1     Fields:    Translation:Animals
    10. Genome of the long-living sacred lotus (Nelumbo nucifera Gaertn.). Genome Biol. 2013 May 10; 14(5):R41. Ming R, VanBuren R, Liu Y, Yang M, Han Y, Li LT, Zhang Q, Kim MJ, Schatz MC, Campbell M, Li J, Bowers JE, Tang H, Lyons E, Ferguson AA, Narzisi G, Nelson DR, Blaby-Haas CE, Gschwend AR, Jiao Y, Der JP, Zeng F, Han J, Min XJ, Hudson KA, Singh R, Grennan AK, Karpowicz SJ, Watling JR, Ito K, Robinson SA, Hudson ME, Yu Q, Mockler TC, Carroll A, Zheng Y, Sunkar R, Jia R, Chen N, Arro J, Wai CM, Wafula E, Spence A, Han Y, Xu L, Zhang J, Peery R, Haus MJ, Xiong W, Walsh JA, Wu J, Wang ML, Zhu YJ, Paull RE, Britt AB, Du C, Downie SR, Schuler MA, Michael TP, Long SP, Ort DR, Schopf JW, Gang DR, Jiang N, Yandell M, dePamphilis CW, Merchant SS, Paterson AH, Buchanan BB, Li S, Shen-Miller J. PMID: 23663246; PMCID: PMC4053705.
      View in: PubMed   Mentions: 163     Fields:    Translation:Animals
    11. Gypsum-permineralized microfossils and their relevance to the search for life on Mars. Astrobiology. 2012 Jul; 12(7):619-33. Schopf JW, Farmer JD, Foster IS, Kudryavtsev AB, Gallardo VA, Espinoza C. PMID: 22794252.
      View in: PubMed   Mentions: 7     Fields:    Translation:Cells
    12. Pioneers of astrobiology. J. William Schopf. Astrobiology. 2011 Jan-Feb; 11(1):9-14. Schopf JW. PMID: 21294675.
      View in: PubMed   Mentions:    Fields:    
    13. Raman spectroscopic study of the mineral composition of cirratulid tubes (Annelida, Polychaeta). J Struct Biol. 2010 Sep; 171(3):402-5. Taylor PD, Vinn O, Kudryavtsev A, Schopf JW. PMID: 20566380.
      View in: PubMed   Mentions: 6     Fields:    Translation:Animals
    14. Discovery of a new chert-permineralized microbiota in the Proterozoic Buxa Formation of the Ranjit window, Sikkim, northeast India, and its astrobiological implications. Astrobiology. 2008 Aug; 8(4):735-46. Schopf JW, Tewari VC, Kudryavtsev AB. PMID: 18844456.
      View in: PubMed   Mentions: 3     Fields:    
    15. Raman spectra of a Lower Cambrian ctenophore embryo from southwestern Shaanxi, China. Proc Natl Acad Sci U S A. 2007 Apr 10; 104(15):6289-92. Chen JY, Schopf JW, Bottjer DJ, Zhang CY, Kudryavtsev AB, Tripathi AB, Wang XQ, Yang YH, Gao X, Yang Y. PMID: 17404242; PMCID: PMC1847456.
      View in: PubMed   Mentions: 15     Fields:    Translation:Animals
    16. Fossil evidence of Archaean life. Philos Trans R Soc Lond B Biol Sci. 2006 Jun 29; 361(1470):869-85. Schopf JW. PMID: 16754604; PMCID: PMC1578735.
      View in: PubMed   Mentions: 62     Fields:    Translation:Cells
    17. New method for the microscopic, nondestructive acquisition of ultraviolet resonance Raman spectra from plant cell walls. Appl Spectrosc. 2006 Apr; 60(4):352-5. Czaja AD, Kudryavtsev AB, Schopf JW. PMID: 16613629.
      View in: PubMed   Mentions:    Fields:    Translation:AnimalsCells
    18. Three-dimensional confocal optical imagery of precambrian microscopic organisms. Astrobiology. 2006 Feb; 6(1):1-16. Schopf JW, Tripathi AB, Kudryavtsev AB. PMID: 16551223.
      View in: PubMed   Mentions: 6     Fields:    Translation:Cells
    19. Raman imagery: a new approach to assess the geochemical maturity and biogenicity of permineralized precambrian fossils. Astrobiology. 2005 Jun; 5(3):333-71. Schopf JW, Kudryavtsev AB, Agresti DG, Czaja AD, Wdowiak TJ. PMID: 15941380.
      View in: PubMed   Mentions: 13     Fields:    Translation:AnimalsCells
    20. Morphological biosignatures and the search for life on Mars. Astrobiology. 2003; 3(2):351-68. Cady SL, Farmer JD, Grotzinger JP, Schopf JW, Steele A. PMID: 14577884.
      View in: PubMed   Mentions: 30     Fields:    Translation:Cells
    21. Atomic force microscopy of Precambrian microscopic fossils. Proc Natl Acad Sci U S A. 2002 Jul 09; 99(14):9117-20. Kempe A, Schopf JW, Altermann W, Kudryavtsev AB, Heckl WM. PMID: 12089337; PMCID: PMC123103.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    22. Laser--Raman imagery of Earth's earliest fossils. Nature. 2002 Mar 07; 416(6876):73-6. Schopf JW, Kudryavtsev AB, Agresti DG, Wdowiak TJ, Czaja AD. PMID: 11882894.
      View in: PubMed   Mentions: 44     Fields:    Translation:Cells
    23. Long-living lotus: germination and soil {gamma}-irradiation of centuries-old fruits, and cultivation, growth, and phenotypic abnormalities of offspring. Am J Bot. 2002 Feb; 89(2):236-47. Shen-Miller J, Schopf JW, Harbottle G, Cao RJ, Ouyang S, Zhou KS, Southon JR, Liu GH. PMID: 21669732.
      View in: PubMed   Mentions: 24     Fields:    
    24. In situ laser-Raman imagery of precambrian microscopic fossils. Proc Natl Acad Sci U S A. 2001 Jan 30; 98(3):823-6. Kudryavtsev AB, Schopf JW, Agresti DG, Wdowiak TJ. PMID: 11158554; PMCID: PMC14667.
      View in: PubMed   Mentions: 6     Fields:    Translation:Animals
    25. Carbon isotopic composition of individual Precambrian microfossils. Geology. 2000 Aug; 28(8):707-10. House CH, Schopf JW, McKeegan KD, Coath CD, Harrison TM, Stetter KO. PMID: 11543502.
      View in: PubMed   Mentions: 14  Translation:CellsPHPublic Health
    26. Solution to Darwin's dilemma: discovery of the missing Precambrian record of life. Proc Natl Acad Sci U S A. 2000 Jun 20; 97(13):6947-53. Schopf JW. PMID: 10860955; PMCID: PMC34368.
      View in: PubMed   Mentions: 3     Fields:    Translation:Animals
    27. Deep divisions in the Tree of Life--what does the fossil record reveal? Biol Bull. 1999 Jun; 196(3):351-3; discussion 354-5. Schopf JW. PMID: 11536910.
      View in: PubMed   Mentions: 4     Fields:    Translation:Cells
    28. Oparin's "Origin of Life": sixty years later. J Mol Evol. 1997 Apr; 44(4):351-3. Miller SL, Schopf JW, Lazcano A. PMID: 9089073.
      View in: PubMed   Mentions: 13     Fields:    
    29. Microfossils from the Neoarchean Campbell Group, Griqualand West Sequence of the Transvaal Supergroup, and their paleoenvironmental and evolutionary implications. Precambrian Res. 1995 Nov; 75(1-2):65-90. Altermann W, Schopf JW. PMID: 11542814.
      View in: PubMed   Mentions: 7  Translation:CellsPHPublic Health
    30. The early evolution of life: solution to Darwin's dilemma. Trends Ecol Evol. 1994 Oct; 9(10):375-7. Schopf JW. PMID: 11539583.
      View in: PubMed   Mentions:    Fields:    Translation:Cells
    31. Disparate rates, differing fates: tempo and mode of evolution changed from the Precambrian to the Phanerozoic. Proc Natl Acad Sci U S A. 1994 Jul 19; 91(15):6735-42. Schopf JW. PMID: 8041691; PMCID: PMC44277.
      View in: PubMed   Mentions: 20     Fields:    Translation:HumansAnimalsCells
    32. Microfossils of the Early Archean Apex chert: new evidence of the antiquity of life. Science. 1993 Apr 30; 260:640-6. Schopf JW. PMID: 11539831.
      View in: PubMed   Mentions: 133     Fields:    Translation:CellsPHPublic Health
    33. Collapse of the Late Proterozoic ecosystem. South Afr J Geol. 1991; 94(1):33-43. Schopf JW. PMID: 11538702.
      View in: PubMed   Mentions: 1  Translation:AnimalsCells
    34. Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group, Australia. Science. 1987 Jul 03; 237:70-3. Schopf JW, Packer BM. PMID: 11539686.
      View in: PubMed   Mentions: 81     Fields:    Translation:CellsPHPublic Health
    35. Microfossils in stromatolitic cherts from the upper proterozoic Min'yar formation, southern Ural Mountains, USSR. J Paleontol. 1984 May; 58(3):738-72. Nyberg AV, Schopf JW. PMID: 11541991.
      View in: PubMed   Mentions: 2  Translation:CellsPHPublic Health
    36. Proterozoic stromatolitic microbiotas of the 1400-1500 Ma-old Gaoyuzhuang formation near Jixian, northern China. Precambrian Res. 1984; 24:335-49. Schopf JW, Wei-Qing Z, Zhao-Liang X, Jen H. PMID: 11541987.
      View in: PubMed   Mentions: 1  Translation:PHPublic Health
    37. The evolution of the earliest cells. Sci Am. 1978 Sep; 239(3):110-2, 114, 116-20 passim. Schopf JW. PMID: 705320.
      View in: PubMed   Mentions: 13     Fields:    Translation:AnimalsCells
    38. Chitinozoans from the late precambrian chuar group of the grand canyon, Arizona. Science. 1977 Feb 18; 195(4279):676-9. Bloeser B, Schopf JW, Horodyski RJ, Breed WJ. PMID: 17816417.
      View in: PubMed   Mentions: 1     Fields:    
    39. Microfossils in conophyton from the soviet union and their bearing on precambrian biostratigraphy. Science. 1976 Jul 09; 193(4248):143-6. Schopf JW, Sovietov YK. PMID: 17759251.
      View in: PubMed   Mentions: 3     Fields:    
    40. How old are the eukaryotes? Science. 1976 Jul 02; 193(4247):47-9. Schopf JW, Oehler DZ. PMID: 17794005.
      View in: PubMed   Mentions: 11     Fields:    
    41. Are the oldest 'fossils', fossils? Orig Life. 1976 Jan; 7(1):19-36. Schopf JW. PMID: 967401.
      View in: PubMed   Mentions: 4     Fields:    Translation:Animals
    42. The development and diversification of Precambrian life. Orig Life. 1974 Jan-Apr; 5(1):119-35. Schopf JW. PMID: 4210319.
      View in: PubMed   Mentions: 7     Fields:    Translation:Cells
    43. Microorganisms from the late precambrian of the grand canyon, Arizona. Science. 1973 Mar 30; 179(4080):1319-21. Schopf JW, Ford TD, Breed WJ. PMID: 17835936.
      View in: PubMed   Mentions: 4     Fields:    
    44. Carbon isotopic studies of organic matter in precambrian rocks. Science. 1972 Mar 17; 175(4027):1246-8. Oehler DZ, Schopf JW, Kvenvolden KA. PMID: 17794201.
      View in: PubMed   Mentions: 5     Fields:    
    45. Artificial microfossils: experimental studies of permineralization of blue-green algae in silica. Science. 1971 Dec 17; 174(4015):1229-31. Oehler JH, Schopf JW. PMID: 17806931.
      View in: PubMed   Mentions: 9     Fields:    
    46. Search for organic compounds in the lunar dust from the sea of tranquiblity. Science. 1970 Jan 30; 167(3918):760-2. Ponnamperuma C, Kvenvolden K, Chang S, Johnson R, Pollock G, Philpott D, Kaplan I, Smith J, Schopf JW, Gehrke C, Hodgson G, Breger IA, Halpern B, Duffield A, Krauskopf K, Barghoorn E, Holland H, Keil K. PMID: 17781583.
      View in: PubMed   Mentions: 3     Fields:    
    47. Micropaleontological studies of lunar samples. Science. 1970 Jan 30; 167(3918):779-80. Schopf JW. PMID: 17781588.
      View in: PubMed   Mentions: 1     Fields:    
    48. Amino acids in Precambrian sediments: an assay. Proc Natl Acad Sci U S A. 1968 Feb; 59(2):639-46. Schopf JW, Kvenvolden KA, Barghoorn ES. PMID: 5238992; PMCID: PMC224720.
      View in: PubMed   Mentions: 2     Fields:    
    49. Alga-like fossils from the early precambrian of South Africa. Science. 1967 Apr 28; 156(3774):508-12. Schopf JW, Barghoorn ES. PMID: 17730741.
      View in: PubMed   Mentions: 25     Fields:    
    50. Microorganisms three billion years old from the precambrian of South Africa. Science. 1966 May 06; 152(3723):758-63. Barghoorn ES, Schopf JW. PMID: 17797444.
      View in: PubMed   Mentions: 17     Fields:    
    51. Microorganisms from the Late Precambrian of Central Australia. Science. 1965 Oct 15; 150(3694):337-9. Barghoorn ES, Schopf JW. PMID: 17742361.
      View in: PubMed   Mentions: 15     Fields:    
    52. Electron microscopy of fossil bacteria two billion years old. Science. 1965 Sep 17; 149(3690):1365-7. Schopf JW, Barghoorn ES, Maser MD, Gordon RO. PMID: 5826530.
      View in: PubMed   Mentions: 4     Fields:    Translation:Cells
    53. Paleobiology of a Precambrian Shale: Geology, organic geochemistry, and paleontology are applied to the problem of detection of ancient life. Science. 1965 Apr 23; 148(3669):461-72. Barghoorn ES, Meinschein WG, Schopf JW. PMID: 17842832.
      View in: PubMed   Mentions: 9     Fields:    
    54. Biological Remnants in a Precambrian Sediment. Science. 1964 Jul 17; 145(3629):262-3. Meinschein WG, Barghoorn ES, Schopf JW. PMID: 17833033.
      View in: PubMed   Mentions: 4     Fields:    
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