Archaeology is a science, and like all sciences, has its limitations. For one, archaeological discoveries made in the past centuries have been reappraised and reinterpreted by more recent findings. Some of the older positive claims, as well as most of the negative criticisms of the Bible, have changed, usually for the better. For another, the actual amount of archaeological evidence is quite small. It has been estimated that less than 1% of archaeological sites in the Holy Land have been excavated, and those that have been excavated have only been partially excavated.