EditorialIn a photo from the U.S. Fish and Wildlife Service, recently dead freshwater mussels from the Clinch River near Wallen Bend, Tenn., Oct. 17, 2019. (Meagan Racey/U.S. Fish and Wildlife Service via The New York Times)
EditorialA spring in Quitobaquito, a natural freshwater spring, where human artifacts dating back 16,000 years have been found, in the Organ Pipe Cactus National Monument where a wall is being built along the Arizona-Mexico border near Lukeville, Ariz. Feb. 19, 2020. (Adriana Zehbrauskas/The New York Times)