Warning shortwaivers. This episode contains many spoilers for the new film Inside Out too.

So continue at your own risk.

You're listening to shortwave from NPR. Pixar released Inside Out in 2015 to critical acclaim and had me and my daughter bawling

in the theaters.

It was a movie that focused on 11-year-old named Riley moving from the Midwest to San Francisco.

This move really shakes up her core emotions, joy, sadness, fear, disgust, and anger.

But as they try to make things better, they first make things worse. In the new film Inside Out 2, Riley is 13 and settled in her new city.

She has best friends and is thriving on the hockey team.

But when puberty hits and her friends tell her they won't be going to the same high school

next year, things begin to change.

And with the arrival of adolescents come for new emotions that appear all at once and are wildly disruptive for Riley and her family.

That's clinical psychologist Lisa DeMore.

Her most recent book is called The Emotional Lives at Teenagers and it's aimed at helping

parents support their teenagers while they go through the stage of their lives. It's work like this that made

her an excellent scientific consultant for Inside Out too.

So what's interesting about the evolution of the films

is that it's actually also mapped onto the evolution of our science of emotion.

So at the time that the first movie came out,

there was this idea that there are these basic universal emotions.

And we now identify at least 20 emotions

that we see as universal and easily you know

distinguish from one another and so it makes sense from the scientific

...