A Brittle Coating on a 2,200-Year-Old Roman Shipwreck Reveals How Ancient Sailors Kept Their Ships Afloat https://www.smithsonianmag.com/smart-news/brittle-coating-on-2200-year-old-roman-shipwreck-revealing-how-ancient-soliders-kept-ships-afloat-180989394/?utm_source=flipboard&utm_medium=activitypub Posted into Smartnews @smartnews-Smithsonianmag