Bath curse tablets the Romans as "Aquae Sulis") were excavated between 1978 and 1983 by a team led by Barry Cunliffe and Peter Davenport. In 1979/1980, around 130 tablets were discovered in an excavation of the "Sacred Spring" under the King's Bath. The spring had been temporarily diverted to facilitate the excavation, revealing a huge array of Roman era items including the tablets. The tablets, some in a fragmentary state, were small and rectangular and initially were assumed to be made of lead, although subsequent metallurgical analysis revealed that they are, in fact, made of lead alloyed with tin, with occasional traces of
Geothermal energy a renewable energy source like geothermal. But as a result of government assisted research and industry experience, the cost of generating geothermal power has decreased by 25% over the past two decades. In 2001, geothermal energy costs between two and ten US cents per kWh. Hot springs have been used for bathing at least since Paleolithic times. The oldest known spa is a stone pool on China's Lisan mountain built in the Qin Dynasty in the 3rd century BC, at the same site where the Huaqing Chi palace was later built. In the first century AD, Romans conquered "Aquae Sulis",