{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/65a47774968ba8001771f445/67c3ae86a02912270d8b4b7e?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"Inventions Episode 7: Concrete","thumbnail_width":200,"thumbnail_height":200,"thumbnail_url":"https://open-images.acast.com/shows/65a47774968ba8001771f445/1740877367165-6d25ef42-927c-48f6-bdee-34718a9bc605.jpeg?height=200","description":"<p>Concrete is, unbelivably, the second-most-used substance in the world - second only to water - and has a truly fascinating history, its secrets lost to time for a millennia or so before re-emerging in the modern era. </p>","author_name":"Riley Knight"}