An Easy Introduction to the Riemann Hypothesis (via Irregular Webcomic!)
Annals of Mathematics: Manifold Destiny : The New Yorker A piece on Perelman, Yau and the Poincaré conjecture
Doodling in Math Class: Infinity Elephants
A 3D Apollonian Gasket
Journeys in dreams are never finished
Mathematically Convoluted Butterfly
Vi Hart: Mathematical Food
Java Apollonian Gasket
Mathematically Correct Breakfast -- Mobius Sliced Linked Bagel
Lockhart's Lament | An Essay on What Has Gone Wrong with Math Instruction
What Math? | Mathematics: The Most Misunderstood Subject (Why Math Should be a Part of a Liberal Education)
An Executable Prime Number?
Julia Map - Google Labs (keyword: fractal)
soft question - Visually stunning math concepts which are easy to explain - Mathematics Stack Exchange (See especially the post that has "www.wisfaq.nl".)
‘The idea of Ramanujan resonates with all teachers in the world'
Tau
No, really, pi is wrong: The Tau Manifesto by Michael Hartl | Tau Day, 2010
Vi Hart's Video About tau
The Pi Manifesto - No, really, pi is right!
Statistics
Bullet Graph
Hollywood Career-O-Matic
Odds Are, It's Wrong - Science News Science fails to face the shortcomings of statistics, By Tom Siegfried, March 27th, 2010; Vol.177 #7 (p. 26)
Chart Showing Gross Sales of Goods from Low IP Industries vs. High IP Industries
Higher Dimensional Objects
Tour 6D (@ YouTube)
Flatland and 4D Projected into 3D (@ YouTube)
Hypersphere (@ YouTube)
Tesseract - Wikipedia, the free encyclopedia (keywords: 4-cube, hypercube, 8-cell)
Klein Bottles
P vs NP
What is it?
Shtetl-Optimized » Blog Archive » P vs. NP for Dummies
P versus NP for dummies @ Things Of Interest
P-versus-NP page
Other Links
Clay Mathematics Institute: Millennium Prize Problems
Proofs, Proofs, Who Needs Proofs? « Gödel’s Lost Letter and P=NP (Why prove statements we seem to be sure are true?)
Deolalikar P vs NP paper - Polymath1Wiki
O Brave New World! at Steven Landsburg | The Big Questions: Tackling the Problems of Philosophy with Ideas from Mathematics, Economics, and Physics
Crowdsourcing Peer Review - Science News (Why what Came out of the Deolalikar N != NP Paper is So Important, Even if it's Wrong)
IBM's P v. NP Talk
Polynomial Time Code For 3-SAT Released, P==NP - Slashdot
Hacker News | The polynomial algorithm for 3-SAT problem (or P=NP)
The Geomblog: A meta-proof