Troy Cross is Professor of Philosophy and Humanities at Reed College where he teaches courses on the philosophy of religion, color, and the philosophy of mind, as well as lecturing in the humanities program. Prior to coming to Reed in 2010, he held positions at Yale and Merton College, Oxford. Cross’s philosophical research interests center on foundational issues in metaphysics and epistemology, but has also been involved in bitcoin for over a decade, cultivating interest in a number of bitcoin-related issues in that time, most of all, the question of bitcoin mining’s present and future environmental impact.