Up close footage of the collapse of the Arecibo telescope in Puerto Rico earlier this month, already in the process of being decommissioned having degraded and lost structural integrity in recent years. Mmf. To wit:
Starting in 1963, the 305-metres across Arecibo Telescope in Puerto Rico USA reigned as the largest single-dish radio telescope in the world for over 50 years. Among numerous firsts and milestones, data from Arecibo has been used to measure the spin of Mercury, map the surface of Venus, discover the first planets outside of our Solar System, verify the existence of gravitational radiation, search for extraterrestrial intelligence, and, reportedly, locate hidden military radar by tracking their reflections from the Moon.
(Video: Arecibo Observatory, NSF)