It took humanity approximately 4 times longer to switch from copper swords to steel swords than it took to switch from steel swords to nuclear bombs. What's another “Let that sink in”
What are the advantages of a bronze sword vs steel or iron (from a pure quality/durability of weapon standpoint)? - Quora
![Bronze vs. Iron vs. Steel | Definition, History & Comparison - Video & Lesson Transcript | Study.com Bronze vs. Iron vs. Steel | Definition, History & Comparison - Video & Lesson Transcript | Study.com](https://study.com/cimages/multimages/16/iron-vs-bronze-invention-of-steel.png)
Bronze vs. Iron vs. Steel | Definition, History & Comparison - Video & Lesson Transcript | Study.com
![Bronze vs. Iron vs. Steel | Definition, History & Comparison - Video & Lesson Transcript | Study.com Bronze vs. Iron vs. Steel | Definition, History & Comparison - Video & Lesson Transcript | Study.com](https://study.com/cimages/multimages/16/iron-vs-bronze-rust.png)