General Science Databases:

Gale Science in Context

A general science database.

Science (journal)
One of the world's leading scientific journals, published weekly. Issues from 1997 to present.

Encyclopedia of Life (EOL)
Free online resource bringing together information about all life on Earth including text, images, video, sounds, maps, classifications and more.

Links to More Specific Science-Related Databases:

Biology Databases

Chemistry Databases

Health / Medicine Databases

Physiology Databases