Welcome to the 93rd edition of the Carnival of Mathematics.
Here's the roundup:
Mr Honner verifies that
this is NOT a trig. function.

Look closely: is this really a trigonometric function? 
John D. Cook shows that the
Probability of Long Runs is greater than we think.

EPainting: Eye  Iris, by Tosin Otitoju 
Nithesh at
Sententia adores this book and wrote a review.
The Music of the Primes by Marcus du Sautoy "is about the history of the several attempts made to solve the
long standing problem in Number theory called the “Riemann Hypothesis”.
It also describes the larger picture about the lives of mathematicians,
their idiosyncrasies, insecurities and their passion for the subject."

Book cover: the music of the primes 

Ed at
Learn To Fish demonstrates
how to draw regular polygons.

How to draw a regular pentagon 
White Group Mathematics features advice for examination candidates at the
Alevels: Focus on what comes next.
Pat B constructs antiparallels, recommending the
topic for high school geometry.

Dragon, by Joan Martines, Messine, 1583 
If you want more pictures, see The Golden Age of Maps/Charts
online or
at the French National Library till next month
If you want some physics, the Foundational Questions Institute has announced
winners of this year's essay contest.
Gracias + Te amo: Cora Sadosky
passed away exactly two years ago. She was the best math professor, ever.
See
Carnival 92 at White Group Mathematics.
Carnival 94 will be hosted in January 2013 by Paul at
The Aperiodical