New York City is cleaning its ancient Egyptian monument with lasers
As reported on Engadget. BY SEAN BUCKLEY A 69-foot, 3,500-year old granite obelisk has stood in New York City’s Central Park for 130 years, and it’s never, ever, been cleaned. The ancient pillar is deceptively fragile, and conservationists have been hesitant simply to hose it down. The solution? Blast it withlasers, of course. After careful testing, the Central Park Conservancy determined that a gentle bath of infrared lasers is both the most sensitive and environmentally friendly cleaning method…