End-of-week Potpourri

Links from the week:
1)  Some puzzles from Presh Talwalkar started the week:
http://tinyurl.com/ntgfqpk
And some more puzzles here:
http://cavmaths.wordpress.com/puzzles-and-starters/

2)  If you can't get enough of James Grime, Reddit did an AMA ('ask-me-anything') thread with him this week:
http://tinyurl.com/o75p57h

3)  Evelyn Lamb told us about Euclid, geometry, and a possibly grumpy Omar Khayyam here:
http://blogs.scientificamerican.com/roots-of-unity/2014/10/28/omar-khayyam-grumpy-with-euclid/

and for Halloween, Evelyn takes on a hot (but scary?) topic in math -- homotopy groups:
http://blogs.scientificamerican.com/roots-of-unity/2014/10/31/higher-homotopy-groups-are-spooky/

4)  Some instances of "bad math" from the popular press:
http://www.bloombergview.com/articles/2014-10-28/bad-math-that-passes-for-insight

5)  Rubik's Cube fans, have at it (...if you dare):
https://www.youtube.com/watch?v=SnsEobXdvzQ#t=137

6)  Back to Presh Talwalkar, who offers up an auditory example of the Bell curve:
https://www.youtube.com/watch?v=YmOsDTczOFs

7)  Do you like your set theory made simple... see n-Category Cafe:
https://golem.ph.utexas.edu/category/2014/10/maths_just_in_short_words.html

8)  Lastly, in time for the Holidays... "The Mathematics Devotional" from Clifford Pickover is available:
http://www.amazon.com/exec/obidos/ASIN/1454913223/cliffordpickover