Open Access for Science


ArXiv is an open access archive of academic articles in physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering

American Association for Advancement of Science

The AAAS seeks to "advance science, engineering, and innovation throughout the world for the benefit of all people."

National Institute of Standards & Technology

ISO provides professional scientific and technical research assistance through three primary programs: Research Library Group, Digital Services and Publications Group, and NIST Museum and History

OpenStax CNX Library


Research Gate

Scientific Electronic Library Online

U.S. Environmental Protection Agency

Find the most popular pages for each of EPA’s top topics, or search the  A-Z index for a more complete



ChemCollective: Online Resources for Teaching and Learning chemistry

Chemistry for Life


General and Quantum Chemistry from the University of Colorado

Royal Society of Chemistry



ESkeletons from the University of Texas

WebAnatomy from the University of Minnesota



DNA Learning Center from CSH (Cold Spring Harbor Laboratory)

Ecology and Society: A journal of integrative science for resilience and sustainability

PHET Interactive Simulations from University of Colorado Boulder

Science in School: The European Journal for Science Teachers



PHET Interactive Simulation

The Physics Classroom

PSRC Physical Sciences Resource Center

Reviews for Modern Physics


Marine Biology

Algae Base Taxonomies


American Fisheries Society


The National Oceanic and Atmospheric Administration


Science and Data from UNEP


UN Atlas of the Oceans


United State Geological Survey