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A thread full of proofs without words at MathOverflow and quite a lot more of them courtesy of Google Books.
posted by Wolfdog on Jul 18, 2011 - 22 comments

The First Zombie-Proof House: "The Safe House" was designed by KWK Promes, and completely folds in on itself to become an impenetrable concrete bunker, keeping you safe from the undead.
posted by bwg on May 6, 2011 - 82 comments

Handwritten 1961 memo in father's immigration file notes Obama born in Hawaii. "Documents obtained from the United States Citizenship and Immigration Service through a Freedom of Information Act request offer evidence that President Barack Obama was born in Hawaii. A memo dated Aug. 31, 1961 from William Wood of Immigration and Naturalization Services indicates that Barack Obama, Sr., was attending the University of Hawaii on a student visa and that a son, Barack Obama, II, was born in Honolulu on Aug, 8, 1961." [Image of Memo]
posted by Fizz on Apr 27, 2011 - 719 comments

New math theories reveal the nature of numbers [1,2] - "We prove that partition numbers are 'fractal' for every prime. These numbers, in a way we make precise, are self-similar in a shocking way. Our 'zooming' procedure resolves several open conjectures, and it will change how mathematicians study partitions." (/.|via) [more inside]
posted by kliuless on Jan 22, 2011 - 45 comments

Futurama has always been a haven for geek humor, but last week's episode "The Prisoner of Benda" pushed things to the next level. First hinted at in an American Physical Society interview with showrunner David X. Cohen (previously), staff writer and mathematics Ph.D. Ken Keeler devised a novel mathematical proof based on group theory to resolve the logic puzzle spawned by the episode's brain-swapping (but no backsies!) conceit. Curious how it works? Read the proof (in the show or in plain text), then see it in action using this handy chart. Too much math for a lazy Sunday? Then entertain your brain with lengthy clips from the episode -- including two of the funniest moments in the series in the span of two minutes.
posted by Rhaomi on Aug 22, 2010 - 130 comments

I am pleased to announce a proof that P is not equal to NP. In this paper, Vinay Deolalikar (HP Labs) proposes a proof to answer the most important problem in its field of mathematics. [more inside]
posted by knz on Aug 8, 2010 - 113 comments

Our results open a fascinating new direction for position-based security in cryptography where security of protocols is solely based on the laws of physics and proofs of security do not require any pre-existing infrastructure.
posted by Joe Beese on Aug 8, 2010 - 47 comments

Did you know that you can create a simple set of directions to your house that works no matter where the recipient starts from? After 38 years this remarkable conjecture has now been proved by a 63-year old former security guard.
posted by unSane on Mar 21, 2008 - 46 comments

How do you prove photography to a blind man?
posted by carmina on Mar 26, 2007 - 21 comments

The Duke lacrosse rape case hurtled toward perhaps sinister motives last week with testimony from the head of the private DNA lab prosecutor Nifong hired to test the rape kit samples taken from the accuser. Brian Meehan revealed that not only had his lab found DNA samples from five unknown men, none of whom were Duke lacrosse players, Meehan had also agreed with Nifong not to put that info in the DNA Security's final report. Were it not for the fact that the three defendants have counsel capable of pouring over thousands of pages of technical documents, this vital, exculpatory evidence would have gone unnoticed. Previous opinions in MeFi.
posted by semmi on Dec 22, 2006 - 276 comments

Proofs and Pictures: The Role of Visualization in Mathematical and Scientific Reasoning [video] "The picture is a telescope for looking into Plato's heaven." -- James Brown [cached]
posted by Chuckles on Aug 20, 2006 - 27 comments

Mercury News D-12's Proof, shot dead at 32. Proof stayed close to give back what he owed - and paid with his life.
posted by archkim on Apr 12, 2006 - 96 comments

Over 300 Proofs of God's Existence!
posted by Citizen Premier on Aug 25, 2005 - 170 comments

Nerdy proof that girls are evil.
posted by betobeto on May 18, 2001 - 13 comments

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