SCIENCE: Harlan Emil Gruber will describe the math and "Earth energies" underlying his Portal installations that have been at Burning Man and other festivals over the last six years in Sacred Geometry + Earth Energies of the Transportals. Writer/Speaker Erik Davis will deliver an introduction, and there will be a reading by writer, healing artist and performance artist Kim Jordan.

6 to 9 p.m. // Sera Phi Healing Center (1117 Howard St) // $11.11

COMEDY: Dave Attell, of "Insomniac" and "The Gong Show" fame, is known for being a comic's comic due to his caustic wit, rapid-fire delivery, and "adult" material.

8 p.m. // Cobb’s Comedy Club (915 Columbus Ave) // $35.50

ART: Seven eclectic Bay Area artists and photographers will exhibit their "stunning portraits, dramatic photography, exquisite landscapes, emotive abstracts, intricate prints, and more" at this special Art Soiree at a private residence.

4 to 8 p.m. // 1080 Eddy St, Apt. 501 (dial 51 to buzz up to Apt. 501) // free