Nestled deep within the dense jungles of the Mexican state of Campeche lies Calakmul, one of the largest and most powerful ancient Mayan cities ever…

It was one of the advanced civilizations in the world, renowned for its calendar and great cities, living thousands of years ago in Central America.…

Have you ever wondered which parts of the Earth support the greatest concentrations of population? And if so, what would be the leading cause of…