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

This major professional organization for biologists in the United States has a number of resources on their website.

The Biodiversity Heritage Library (BHL) is the world’s largest open access digital library for biodiversity literature and archives

Multimedia site that explains cell-level biology. Includes graphics and text on plant cells, animals cells, mitochondria, and various diseases.

Established in 1988 as a national resource for molecular biology information, NCBI creates public databases, conducts research in computational biology, develops software tools for analyzing genome data, and disseminates biomedical information - all for the better understanding of molecular processes affecting human health and disease.

The flagship project of the Global Change Data Lab, Our World in Data​ is focused on increasing the use of data and evidence to make progress against the world’s largest problems. They cover over 291 topics, including Health, Energy and the the Environment, Food and Agriculture and more.

Science.gov is a gateway to U.S. government science information. The portal offers free access to research and development (R&D) results and scientific and technical information from scientific organizations across 13 federal agencies.