11:11. Just in case you haven't already heard about it, people all over the world have been experiencing the most amazing phenomenon in the history of our planet. I suggest that you click on The Rainbow Chamber link to continue.
posted by mrgrimm on Nov 11, 2008 - 125 comments

A new crop circle formation in Wiltshire depicts the first 10 digits of pi. [more inside]
posted by casarkos on Jun 20, 2008 - 96 comments

Cymatics: A Study of Wave Phenomena & Vibration
posted by acro on Apr 19, 2008 - 5 comments

Self-Illustrating Phenomena. Slides from a 2005 talk by Pat Hanrahan. Scroll down his page for more talks.
posted by Taksi Putra on Apr 7, 2008 - 12 comments

Things That Look Like Other Things. Also known as pareidolia, it's the phenomenon in which our brains perceive familiar things (especially faces and human forms) in random places. See also The Pareidolia Museum and the Flickr pareidolia pool. [Previous pareidolia-related threads here]
posted by amyms on Mar 28, 2008 - 40 comments

Diverse rainbows, unicorns notably absent.
posted by longsleeves on Sep 28, 2006 - 12 comments

What is The Hum? Some residents of Taos, New Mexico suffer from it, and it seems to happen elsewhere, too. Listen to it here and here (.wav files, and not actually very dramatic). No one knows quite what the hum is, and even refutations don't really work. There are some "scientific" explanations, but The Hum Remains mysterious and sinister.
posted by interrobang on Dec 20, 2004 - 33 comments

In Ghostly Japan, by Lafcadio Hearn, an "American author who lived in Japan, becoming a naturalized citizen, from 1891. His 1904 volume Kwaidan: Stories and Studies of Strange Things is perhaps the work for which he is best known today; it continues to serve as an introduction of non-Western supernaturalism to a Western audience".[more]
posted by hama7 on Mar 13, 2003 - 15 comments

Animals trapped in stone have been reported many times, but do you believe it? Why has there been so little investigation of these claims? It could be the key to re-animation...
posted by agregoli on Dec 17, 2002 - 36 comments