Degrees of Change: Building Materials. Feb 28, 2020, Part 1 Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email The Mjøstårnet building in Norway, the world's tallest timber building. ( Peter Fiskerstrand, via Wikimedia Commons ) Hosted by Ira Flatow Produced by Science Friday and WNYC Studios