Origins of common household items, revealing how war, accidents, and industrial breakthroughs transformed these innovations ...

But some metals are magnetic and some are not. The most common magnetic metal is iron. You don't see too many objects made of pure iron but you do see lots of different things made of steel, which has ...

Anna: Objects are made out of materials. And there are lots of examples around this garden. There's metal. Wood. Stone. And a lot of glass. This is cork, it's a type of wood. You take that ...