Not only are these animals new to science, but they're adapted to very specific environments – some of them, to a single room in one cave.

That area's been tussled over for years.

We thought we might find at least another handful of new species. It was amazing to get 27.

…when we removed the body (of his cagemate) to the operation room, the other chimp wept bitterly and was inconsolable for days. The incident made a deep impression on me. I vowed never again to experiment with such sensitive creatures.

Researchers, with science as their authority, will be able to cut [Animals] up, alive, into small pieces, drop them from a great height to see if they are shattered by the fall, or deprive them of sleep for sixteen days and nights continuously for the purposes of an iniquitous monograph... ''Animal trust, undeserved faith, when at last will you turn away from us? Shall we never tire of deceiving, betraying, tormenting animals before they cease to trust us?''

I believe I am not interested to know whether vivisection produces results that are profitable to the human race or doesn’t. To know that the results are profitable to the race would not remove my hostility to it. The pains which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of enmity without looking further.