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What problems face archaeologists in their work of rewriting history using unwritten sources?

Answer Text:
-The exercise is too expensive.
-It’s dangerous and tedious. Animals like wild dogs can attack scientist.
-Identification of the site is not easy because artifacts are buried.
-Some artifacts may offer very little evidence.
-Artifacts can be destroyed in the process of digging.
-Dating of fossils is difficult.
-Personnel are few hence more work.
-Poor infrastructure in rural areas where their research are mainly based.
-Archaeologists may suffer from diseases caused by climate change.