World of Science contains budding encyclopedias of astronomy, scientific biography, chemistry, and physics. This resource has been assembled over more than a decade by internet encyclopedist Eric Weisstein with assistance from the internet community. MeFi visited Weisstein's Mathworld a couple years ago.
posted by netbros on Feb 18, 2009 - 6 comments

The Encyclopedia of Life project will create a compendium of every aspect of the biosphere. It aims to compile data on all of Earth's 1.8 million known species on one Web site, and will include species descriptions, pictures, maps, videos, sound, sightings by amateurs, and links to entire genomes and scientific journal papers. E. O. Wilson is getting his wish. [Via BB.]
posted by homunculus on May 9, 2007 - 31 comments

The journal Nature: "Wikipedia comes close to Britannica in terms of the accuracy of its science entries."
Nature had experts review articles from both encyclopedias. (Also, 10% of Nature authors contribute to Wikipedia.)
posted by Tlogmer on Dec 14, 2005 - 31 comments

Prof. George W. Hart, of the Computer Science Department at SUNY Stony Brook, has an enviable web presence. His Encyclopedia of Polyhedra alone is worth the visit, his geometric sculptures make the nerd in me weep at their beauty, and his trilobite recipe looks mighty yummy.
posted by ewagoner on Dec 19, 2002 - 12 comments