Ancient Swedish Petroglyphs Reveal People, Ships, and Animals.

Researchers have discovered around 40 petroglyphs, dating back around 2,700 years, on a granite rock face in western Sweden. The petroglyphs depict ships, people, and animal figures, including four-legged creatures that may be horses. The biggest one shows a ship that is 13 feet long. The petroglyphs were likely created by people standing on a boat or a platform constructed on ice. The exact meaning of the carvings is uncertain, but they may have served to mark ownership or tell a story.