In some places like Oaxaca the chocolate is sold as an artisanal product. This means you walk into a molino (mill) where they grind the cocoa beans together with your favorite ingredients in the ratio you specify. The mix emerges still hot from the grinding and is a super sensory shock if you have never tasted hot ground cocoa.
Mail Order for Mexican Ingredients, http://splendidtable.publicradio.org/gourmetguide/source_mexican.html
A molinillo is a wooden beater with a round grooved end beneath several loose rings.
Recipe courtesy of Ricardo Muñoz and translated by Ruth Alegria
Jeremy Bailenson, founding director of Stanford University's Virtual Human Interaction Lab, is studying whether the experience of being a virtual cow will make people feel more empathy. "[Our previous work] showed that if you had occupied the avatar of another person, you showed empathy toward them," Bailenson says. "But no one had ever tried this with another species."