Pyramids made out of concrete

I'm used to hearing that ancient Egyptians invented nearly everything: beer, paper, ink, sails, multi-dimensional Stargates. Now it seems they may have also invented concrete.

Of course Zahi disagrees. Or at least he will until he reveals it on his next National Geographic Explorer special.
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Issandr El Amrani

Issandr El Amrani is a Cairo-based writer and consultant. His reporting and commentary on the Middle East and North Africa has appeared in The Economist, London Review of Books, Financial Times, The National, The Guardian, Time and other publications. He also publishes one of the longest-running blog in the region,