Study on "Mars"

Researchers and divers have started studying the Mars, the pride of Sweden's 16th-century navy, has held for 450 years. The Mars lies at the bottom of the Baltic Sea, where it sank during a naval battle in 1564. (Source: http://news.nationalgeographic.com/news/2014/07/140707-mars-shipwreck-warship-baltic-sea-archaeology-science/ )