• This July 13, 2016 photo shows the world's largest single-dish radio telescope at the Arecibo Observatory in Arecibo, Puerto Rico. Dwindling funds from the U.S. government and construction of bigger, more powerful telescopes in places like China and Chile are threatening this telescope's existence. It performs tasks like searching for gravitational waves, listening for extraterrestrial signals and tracking asteroids that might be on a collision course with Earth.  (AP Photo/Danica Coto)

    Funding threatens future of giant telescope in Puerto Rico

    ARECIBO, Puerto Rico (AP) — The world’s largest single-dish radio telescope is nestled deep in the lush green hills of Puerto Rico, where it performs tasks like searching for gravitational waves, listening for extraterrestrial signals and tracking asteroids that might be on a collision course with Earth.