A two-day Mexican celebration that honors the dead takes place today and tomorrow. The tradition in which the departed are remembered with food, music, and ritual has its roots in pagan rites as well as Catholicism, Tim Gaynor writes in an article for Reuters. In San Francisco, an eerie candle lit procession takes place each year on the evening of November 2nd, with many participants dressed as skeletons. In the image on the left that I took at one such event, a huge marionette-like skeleton surreally danced above the crowd. --L.L.