One of the most impressive uses of ceramics in the modern world is the tiles of the space shuttle. Older spacecraft used ablative plates that were formulated to slowly disintegrate and take the heat away from returning spacecraft. They could be used only once before their wear life was over. The ceramic tiles on the space shuttle could be used on repeated missions. They were checked each time and only replaced when necessary. While the space shuttle flamed its way to orbit and was eventually shut down, scientists continued to work with ceramics. They experimented and combined different materials to create newer, stronger and more versatile ceramics. The world today has been vastly changed by these materials. They are now used in computers, electrical systems, cars, as joint replacements and building materials and are still used to decorate homes with beautiful objects of art and dishware.