In our quick-to-throw-things-away society, plastic and rubber seem to rule. However, many still value stability, craftsmanship and lasting beauty. Items displayed in museums from ancient civilizations – such as bowls, jewelry and art – are often crafted from stones. Their durability is unrivaled and – when made from agate, jasper or other colorful stones – they are mesmerizing. … [Read more...] about Having a Ball: Learning How to Make a Sphere