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Ronald Rael is a professor of architecture with a joint appointment in the Department of Architecture in the College of Environmental Design, and the Department of Art Practice at the University of California, Berkeley. He cofounded the company Emerging Objects with architect Virginia San Fratello and is the author of Earth Architecture (2008), Borderwall as Architecture: A Manifesto for the US-Mexico Boundary (2017), and Printing Architecture: Innovative Recipes for 3-D Printing (2018).