America's New Invention Could Make Steel Obsolete

America's new materials race is challenging steel from four directions at once: Superwood from trees, a Purdue cobalt-aluminum alloy, AI-designed nanolattices, and ORNL carbon fiber composite advances. This episode explains how these breakthroughs work, why steel is vulnerable, and why the next structural material could reshape construction, aerospace, infrastructure, and supply chains. 00:00 A wood-like material stronger than steel 01:35 Why steel dominated the modern world 03:15 Superwood and the cellulose nanofiber process 06:10 Carbon, building codes, and commercial adoption 08:40 Purdue's cobalt-aluminum alloy breakthrough 11:40 AI nanolattices and lightweight structures 14:30 ORNL carbon fiber composite advance 17:10 Why steel's carbon problem changes the economics 19:20 China, supply chains, and American materials strategy 21:30 What a post-steel future could look like