archaeologists is the simple subject of this sentence. it is what is being described and used as a noun
Answer:
The answer to your question would be that the simple subject of the sentence is "discoveries".
Explanation:
Simple subject is the term used for the single word that is the subject of the verb. The fact is that a subject may have modifiers before or after it, but when removed, the word left is the simple subject. In this case, the noun head of this postverbal subject is "discoveries".