In “Decoding the Great Pyramid,” AERA’s Mark Lehner, Claire Malleson, Glen Dash, and Richard Redding join Salima Ikram and Pierre Tallet to discuss the latest research into how the Great Pyramid was built and how building it transformed Egyptian society. Now PBS is making this and some of their other favorite NOVA episodes available online for free.

How did the ancient Egyptians engineer Khufu’s Great Pyramid at Giza so precisely? Who were the thousands of laborers who raised the stones and how were they housed and fed? And how did mobilizing this colossal labor force transform Egypt? Watch “Decoding the Great Pyramid” on PBS.com to find out.