Born:(1951-04-23) April 23, 1951 (age 74), West Reading, Pennsylvania, US
Awards:Guggenheim Fellowship, , Charles Doolittle Walcott Medal (1987), , Raymond C. Moore Medal (2005), , Mary Clark Thompson Medal (2012), , International Prize for Biology (planetary science, United States, 2018), , Foreign Member of the Royal Society (2015, 2015), , Wollaston Medal (2007), , Crafoord Prize in Geosciences (2022)
Thesis:Studies in Archean and early Proterozoic paleontology (1977)