A large scientific readership PNAS papers reach millions of top researchers each year and have one of the world's largest scientific audiences. Our equitable access and open access programs help us achieve our goal of making scientific knowledge available to all. In addition to scientists, scholars, students, and educators in schools and universities across the United States and around the globe, many members of the public use PNAS online as a source of reliable information and research evidence. PNAS articles are used by academic researchers, health professionals, policy makers, and the general public. Because science advances through the work of many researchers, publications such as PNAS are important tools for sharing knowledge quickly within our field and with others outside it. Science journalists such as those at PNAS cover topics from climate change to nanotechnology through articles written for an audience beyond academia. Students use PNAS content to explore scientific issues via research projects, essays, and lectures. Educators include PNAS content in course materials for undergraduate students, graduate students, faculty, and staff. Members of the public use PNAS online to search for information on research studies and reports on topics from autism to war to welfare. In addition, PNAS articles are used by businesses seeking evidence-based information about their products or services. The publication hosts several partner websites that draw traffic from non-scientific users. Science journalism has become an essential part of modern society.