A CITY WITHIN A CITY: FOSSIL CORAL

Fossil Coral — A City within a CityHere are some beauties for you — lovely fossil coral, frozen in stone yet once very much alive. At first glance it looks like a single organism, but that's the clever bit. Corals are really bustling little cities, built by thousands of tiny marine animals called polyps. Think of them as the world's oldest condominium developers... only with much better