How come manhole covers are seemingly always round and not square? 🤔 Manhole covers are round primarily because they are the safest shape, as a round cover cannot fall through its own circular opening, unlike a square cover which could be tilted and dropped in! #science #physics #engineering #construction | Learning with Lyrics

Terrifying Manhole Blasts Erupt in Manhattan New York City, New York — March 12, 2025 A series of subterranean electrical fires triggered a chain reaction of manhole explosions in the heart of Manhattan Wednesday afternoon, sending plumes of smoke and fire shooting into the air. Pedestrians were forced to run for cover as heavy metal covers were launched from the asphalt, followed by high-pressure bursts of steam and towering orange flames. Dramatic footage captured the moment several manholes a