The AAAS seeks to "advance science, engineering, and innovation throughout the world for the benefit of all people." AAAS publishes four premier peer-reviewed journals, Science being the most prominent.
A part of the U.S. Department of Health and Human Services, NIH is the largest biomedical research agency in the world. NIH’s mission is to seek fundamental knowledge about the nature and behavior of living systems and the application of that knowledge to enhance health, lengthen life, and reduce illness and disability.
Science.gov is a gateway to government science information and research results. Science.gov provides a search of over 60 scientific databases and 200 million pages of science information with just one query, and is a gateway to over 2200 scientific websites.