'Scientists are trying to solve a mystery surrounding a collection of inscribed symbols in Scotland, which they say had been there before the country was formed. Linguists say the symbols were carved on stone by an ancient community known as the Picts, who lived in today's Scotland from the 4th to the 9th centuries. Researchers from UK's Exeter University examined symbols on more than 200 and concluded that the symbols are 'words' rather than mere images.'

Read more: Scotland's Stone Carvings Puzzle Scholars