Rome's Colosseum to get a high-tech retractable floor

Potential projects must be submitted for review by February 1 and fit stringent criteria laid out by officials overseeing the €10 million project. https://www.dailymail.co.uk/sciencetech/article-9082233/Romes-Colosseum-high-tech-retractable-floor.html?ns_mchannel=rss&ns_campaign=1490&ito=1490