Archaeologists can often find information left behind by ancient humans in the ruins. For example, they can analyze a lot of interesting things from what may seem like trash to ordinary people.
For example, archaeologists can infer the time of a banquet and the eating habits of local people through bones and fruit cores.
They can even further infer the financial situation, logistics, and a series of other information of the area through the last discovered recipes.
That's also why archaeologists hate private treasure hunters because they only focus on items with enough economic value, which can end up destroying many carriers with information in them.
"This statue must be worth a lot of money." Fairmont whispered as he looked at the statue of Mithra placed in the main position of the cave. He noticed that it was very similar to the one currently hidden in the British Empire Museum in London.