January 30th, 2010: "The Mathematics of Dance: Understanding symmetry, permutation, and chaos with dance", featuring Dr. M Shel Swenson.

These are the youtube clips that Dr. Swenson used in her talk (times for the interesting segments are listed):


Mirror (reflectional symmetry): (start to 1:35)




Irish Dancing (translational symmetry):(1:10-2:30ish)



Busby Berkeley waterfall (rotational symmetry):(5:10-7ish)



Frog lake: (all)



Contortionists (potato salad gals):(0:55 - end)



Square Dancing (permutations):(1:35 - 2:30ish)



Permutation:(0:00 - 1:13)