America’s one of the most intriguing geological mysteries: The Mima Mounds of Washington State spread across the Mima Prairie in Thurston County. Hundreds of rounded earthen mounds have puzzled scientists for more than 100 years now, as reported by Discovery UK.

Even after centuries of painstaking research, scientists have been unable to hit upon the origins of the oval shaped mounds that are found in the Natural Area Preserve in…

America’s one of the most intriguing geological mysteries: The Mima Mounds of Washington State spread across the Mima Prairie in Thurston County. Hundreds of rounded earthen…