"In the first four weeks, I shed a stone — and in six months I’d lost four more, injecting myself once a day and spending £900 in total. "When I hit 18st and a size 18, I found the courage to ...

Turning surplus water into a construction ally would have converted a hazard into free labor. The shift paid off quickly. Stone sizes doubled within a generation, and by the time Khufu’s Great Pyramid ...