" When I talk to people about what makes us human, some people say it’s our tears. Because we are the only ones who weep, only we can feel true sorrow. When I hear this, I remember Isiro’s face, her anguished eyes as she cried for Mikeno, how she screamed at the keepers with her teeth bared and pushed at the poles. How she dashed back to his body and dug her fingers into his chest as if the strength of her grip could bring him back. There is sorrow without tears. Of course there is. "

― Vanessa Woods , Bonobo Handshake: A Memoir of Love and Adventure in the Congo