Daniel is a PhD candidate in philosophy at the University of Colorado. His dissertation is on Aristotle's account of self-motion (motility) in non-human animals. At an upcoming Origins conference, Daniel will present some of his dissertation work: he'll explain how Aristotle uses some observations about animal life and self-motion to argue that motion has a source but not a beginning. While Daniel's main area of specialization is ancient philosophy, especially ancient science, his work in print covers not just ancient but also areas such as environmental ethics, free will, mortality, and moral responsibility. His work has appeared in peer-reviewed journals including Ancient Philosophy, Rhizomata: A Journal for Ancient Philosophy and Science, Res Philosophica, the Journal of Philosophical Research, Acta Analytica, The Philosophical Forum, Philosophia: The Philosophical Quarterly of Israel, the Southwest Philosophy Review, and Ethics & the Environment.