a bonobo knuckle-walked over to me, clearly curious. I surmised from the chart of photos I had been studying that her name was Lisa. She seated herself at the window and stared at me. I stared back. A family with a toddler and a baby in a stroller stood next to me. Lisa stuck her finger up her anus, pulled out a greenish-yellow dollop of feces, and considered it. Then she popped it into her mouth and chewed with gusto.
