Recent research in Iran’s Takht-e Rostam archaeological site has unveiled significant insights into the Caspian Sea’s shoreline, dating back over 31,000 years. This site, crucial for understanding Paleolithic human settlements, revealed that the Caspian Sea once extended further than its current boundaries. Excavations led by Hossein Ramadanpour unearthed over 2,600 stone tools, indicating extensive human activity. The findings, published in the Iranian Journal of Archaeological Studies, highlight the site’s geological significance, with sediments dating back two million years. Registered as a national heritage site since 2002, Takht-e Rostam continues to shed light on early human interactions with their environment.