The history of Armenia and Armenians is very ancient and can go back at least 2000 BC. Archaeologists say the Shulaveri-Shomu culture of the central Transcaucasus region, and Armenia today, as the earliest known prehistoric culture in the area, carbon-dated to around 6000 - 4000 BC. But, a newer discovered tomb has been dated to 9000 BC. Another early culture in the Armenian Highlands and surrounding areas—the Kura-Araxes culture is in the period of ca. 4000 - 2200 BC, and is believed to have to go into the Trialeti culture (ca. 2200 - 1500 BC), and meaning Armenians are one of the oldest Indo-European subgroups.