'6,000-yr-old amulet depicts technology still used by NASA'
Scientists have discovered a 6,000-year-old amulet, which they found was made through a technique called lost-wax casting, a process NASA uses to produce equipment which has even flown to Mars and the International Space Station. The age-old process of metal casting involves pouring molten metal into a mould that has been created by means of a wax model.