The Importance of Investing in Physics 2University of Edinburgh, Edinburgh, United Kingdom February 2, 2021• Physics 14, 17 Research with immediate applications is easy to justify, but there are economic and philosophical reasons to invest in physics even when the return is not obvious. samunella, Mechanik, and Nicolas delafraye/stock.adobe.com Medical MRI, satellite navigation, and optical-fiber communication are some of the technologies made possible by fundamental physics research. samunella, Mechanik, and Nicolas delafraye/stock.adobe.com Medical MRI, satellite navigation, and optical-fiber communication are some of the technologies made possible by fundamental physics research.× With large-scale COVID-19 vaccination programs now underway, some optimism about the new year seems justified. But even when the medical emergency phase of the pandemic is behind us, its economic consequences will linger for years to come. Funding for “pure” research is hard fought even in the boom years—can it still be justified in the straitened times ahead? In two essays, Cherry Murray of the University of Arizona and Nick Treanor of the University of Edinburgh, UK, give reasons to believe that it can. Using examples of technological and industrial impacts, Murray argues that investing in physics research makes economic sense. In a separate essay, Treanor explains that even without such tangible benefits, physics research can be justified because the insights that it provides into the world are especially deep. —