Celebrate the glory of pi and pie with a night of mathematical merriment, and pie tastings and demonstrations. Get irrational in the “pi zone” with fun math activities from UC Berkeley’s Mathematical Sciences Research Institute, then grab a hula hoop and contemplate the ratio of its circumference to its diameter as you gyrate. Rationalize the nutritional value of a slice in the “Pie Zone” with samples from Whole Foods and Peasant Pies, a pie-making demonstration by the Academy Cafe, and an activity from the dough-wranglers at Pie Ranch. In the planetarium, learn about the unheard music of planetary motion in a special presentation titled Music of the Spheres at 6:30, followed by two showings of Earthquake. Music by the DJs of LoveTech.