CRC Concise Encyclopedia of Mathematics

[ http://www.astro.virginia.edu/~eww6n/math/math.html ]

MATH Database 1931-1999

[ http://www.emis.de/cgi-bin/MATH ]

The Particle Data Group

[ http://pdg.lbl.gov/ ]
summaries of recent particle physics data and theory

Databases for Atomic and Plasma Physics

[ http://plasma-gate.weizmann.ac.il/DBfAPP.html ]

NIST reference on Constants, Units, and Uncertainty

[ http://physics.nist.gov/cuu/index.html ]

Ned Wright's Cosmology Tutorial

[ http://www.astro.ucla.edu/~wright/cosmolog.htm ]

the Astrophysical Journal Electronic Edition

[ http://www.journals.uchicago.edu/ApJ/journal/ ]

NASA Astrophysics Data System

[ http://adswww.harvard.edu/ ]

Tree of Life Project Root Page

[ http://phylogeny.arizona.edu/tree/life.html ]

The talk.origins archive, FAQs, and resources

[ http://www.talkorigins.org/ ]

Evolution Update

[ http://www.geocities.com/CapeCanaveral/Lab/7111/ ]