PhysicsSupersonic cracks seem to be breaking the laws of physics An experiment with elastic gels broke the theoretical speed limit for how fast cracks can move through materials, raising new questions about the physics of fractures 51¶¯Âþ
SocietyEnglish industrialist stole iron technique from Black metallurgists A process for converting scrap metal into high-quality iron, which was crucial to the Industrial Revolution, was devised by Black metallurgists who were enslaved and transported to Jamaica by the British 51¶¯Âþ