About 25 years ago, the acclaimed cellist asked a high school student to help him name his instrument. He brings his cello — aka "Petunia" — to the Fresh Air studio for music and conversation.

NPR Tiny Desk contest winner Quinn Christopherson, drag queen Pattie Gonia and world-renowned cellist Yo-Yo Ma would like "Won't Give Up" to be sung at climate change rallies and in concert halls.

Musician and artist Tunde Olaniran is a rising star from Flint, Michigan whose exuberant work comments on serious issues such as environmental injustice and the carceral state.

On a new album, the classical stars revisit the concerto Williams composed specifically for Ma, as well as some of Williams' most affecting film scores.