Скачать или смотреть This Wood Stops Cannonballs. The US Navy's 'Secret Armor'. Why Did The Steel Industry Erase It?

During the War of 1812, British cannonballs slammed into an American warship — and bounced off the wooden hull as if it were made of iron. That ship was the USS Constitution, nicknamed "Old Ironsides," but its secret wasn't metal at all — it was wood with an interlocking grain so dense it's practically immune to splitting, even under explosive impact. That wood is Southern Live Oak, the legendary super-tree of the American South, and for decades it was the biological armor that guaranteed naval supremacy. But when the Bessemer Steel process arrived, the Navy abandoned it in favor of metal plating that rusts, corrodes, and sinks when breached — keeping the mining and steel industries in business forever. In this video, we uncover the forgotten science behind nature's cannonball-proof wood and why the steel industry made sure it stayed forgotten.