The composer has long been inspired by nature without sending an explicit political message. But his latest work takes on a newly urgent tone.

"...The Latin binomials of 192 endangered species make up the incantatory text of “Litanies of the Sixth Extinction,” the grim, dark heart of “Vespers of the Blessed Earth,” a new, 50-minute work by John Luther Adams that the Philadelphia Orchestra, the Crossing and the soprano Meigui Zhang will premiere under Yannick Nézet-Séguin in Philadelphia on Thursday, before taking it to Carnegie Hall on Friday."

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