Jane Goodall formed incredible bonds with chimpanzees in the wild.

"First they were afraid. Then they became belligerent. And then when I wouldn't go away, ‘Well, I guess she's okay.’ They came to trust," Goodall said.

But were those bonds similar to what we humans experience as trust?

In the first episode of On Point's series Essential trust, hear all about how the ability to trust strangers may be one of the things that makes us uniquely human.