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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 with lasers, of course. After car...

10 months ago 0 Comments
April 29, 2014 at 11:08PM