It takes very little work to make your own stock; mostly it is a matter of being at home for the several hours it takes to cook. A flavorful money saver that is practically fat- and salt-free, homemade stock can be frozen in small quantities and used as needed.
Chicken backs and necks are available at most supermarkets. If you don't see them, ask the butcher to set aside some for you. I also make stock from the bones of roasted chicken or turkey.
Excerpted from Essential Pépin, © 2011 by Jacques Pépin. Reproduced by permission of Houghton Mifflin Harcourt. All rights reserved.
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."