A 3000-year-old copper smelting site could be key to understanding the origins of iron - Phys.org9/26/2025A 3000-year-old copper smelting site could be key to understanding the origins of iron Phys.org... Original Let us know what you think! Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.