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In the 21st century, the different methods of archaeology include high-tech analysis of archaeological sites with magnetic equipment, electrical sensors, and even satellite photography.
Specialized methods such as underwater archaeology, urban archaeology and rescue archaeology are employed for sites in unusual locations.
They do not, however, give "absolute" dates because they merely provide a statistical probability that a given date falls within a certain range of age expressed in years.
Chronometric methods include radiocarbon, potassium-argon, fission-track, and thermoluminescence.
In modern times, archaeologists attempt to honor the laws of their host governments and any connections these cultures may have with ancient societies, a method called cultural resource management.