A fundamental question surrounds discussion of the current evidence for recent global climate change: to what extent is climate variation a normal feature of earth-system history? Through a series of investigations using data from a variety of climate archives, this course develops the history of earths climate on a range of time scales. We will investigate the scientific data used in recognition of multiple controls on climate, including long- and short-term patterns in solar output, plate tectonic and ocean circulation patterns, variations in earths orbit, ocean oscillations, ice sheet dynamics, and biogeochemical cycles. Having established this background knowledge, students in this course will be well-equipped to analyze the evidence for human-caused climate change. Although this course is intended primarily for non-scientists, it builds on established quantitative skills and basic scientific knowledge of earth systems.