{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/6646b6ea6a0bf400128a1a00/6a85bb35a835875d37a5ff2f?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"Spiral Staircase Energy","description":"<p>Turns out the most universally beloved building type is basically a fancy candle in a stone tube. Rae and Andi cover whale oil, concentric prisms, and the surprisingly emotional case for saving obsolete towers nobody technically <em>needs</em> anymore. Calves of steel required.</p>","author_name":"Andrea Smith"}