1 Fernando Casado Cañeque and Stuart L. Hart, eds., Base of the Pyramid 3.0: Sustainable Development Through Innovation and Entrepreneurship, Sheffield, United Kingdom: Greenleaf, 2015. 2 Allen L.
Construction workers discovered a roughly 1,375-year-old pyramid by accident ... and charred wood. An extensive study of the structure revealed that the pyramidal base was stabilized with a ...