Introductions to cellular concepts through still images and videos.

EOL brings together trusted information from resources across the world such as museums, learned societies, expert scientists, and others into one massive database and a single, easy-to-use online portal.

Authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

The Taxonomy Database is a curated classification and nomenclature for all of the organisms in the public sequence databases. It currently represents about 10% of the described species of life on the planet.

Making data and images of millions of biological specimens available on the web.

3-D animations of organic chemistry reactions (University of Liverpool).

A free chemical structure database providing fast text and structure search access to over 43 million structures from hundreds of data sources.

Dictionary of molecular entities focused on ‘small’ chemical compounds.