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PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.

SumoBrain - Big, Powerful, Smart Searching

Science.gov is a gateway to government science information provided by U.S. Government science agencies, including research and development results.

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Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

Natural Standard, the Authority on Integrative Medicine

The National Academies Press (NAP) publishes authoritative reports issued by The National Academies. Publications address key issues in science, engineering, social sciences, medicine and health. Topics range from space science to animal nutrition to...

Medify gives you access to millions of unbiased findings on symptoms and treatments for Autism, Alzheimer's, Cancer, Lymphoma, Leukemia and more.

Aggregates information on biology, agriculture, horticulture, forestry, geography, the environmental sciences, and the health sciences