At a Glance

Dmanisi lies on a triangular promontory above the confluence of the Mashavera and Pinezauri rivers, 93 km southwest of Tbilisi in the Kvemo Kartli region of Georgia. The site has two distinct archaeological layers: on top, the ruins of a medieval Georgian city (Dmanisi) occupied from the 6th to the 14th century AD; below the medieval foundations, ancient volcanic sediment layers containing the bones of early humans and extinct animals. The lower layer was discovered by accident during excavations of the medieval city in 1983. It has since become one of the most significant palaeontological and archaeological sites in the world. The skulls and bones are housed at the Georgian National Museum in Tbilisi; the site itself is a protected museum reserve.

The Discovery That Changed Palaeoanthropology

Before Dmanisi, the prevailing model of human prehistory held that Homo erectus only left Africa after developing the Acheulean stone tool culture — large, carefully shaped handaxes that appeared around 1.5 million years ago. The logic seemed sound: only with advanced technology could early humans survive beyond the African continent. Dmanisi destroyed this model. The five hominin individuals found there — represented by skulls, jawbones, and skeletal fragments — carried only simple Oldowan-style tools: the same basic flaked stones made by the earliest Homo habilis in Africa. Yet they had already crossed into Eurasia, at 1.77–1.85 million years ago. The first human migration out of Africa happened approximately 400,000 years earlier than previously believed, and with simpler technology than expected.

The Five Individuals and What They Tell Us

Five hominin individuals have been identified at Dmanisi, representing a range of ages and body sizes. The cranial capacities range from 600 to 775 cc (for comparison, modern humans average around 1,350 cc). They were small by modern standards: estimated height 1.45–1.66 metres, weight 40–50 kg. Their limb proportions were close to modern humans, suggesting they were effective long-distance walkers. The brain anatomy suggests a mosaic of primitive and derived features. Teeth analysis indicates a diet that included meat and marrow from large animals — the site also contains cut-marked animal bones confirming butchery activity.

Skull 5 and the Earliest Known Social Care

The fifth skull recovered at Dmanisi, published in the journal Science in 2013, is the best-preserved early hominin skull ever found. It belonged to an elderly adult male with one of the smallest braincases in the assemblage. What makes Skull 5 extraordinary is a detail noticed in the jawbone: the individual had lost all his teeth years — possibly a decade or more — before death. The bone had fully resorbed around the empty tooth sockets, leaving a smooth, toothless jaw. A toothless early hominin in a world without cooked food or agriculture could not have survived alone. Other group members must have been providing him with soft, pre-processed food. This is the earliest known evidence of deliberate social care for a disabled or elderly individual in the entire fossil record of human evolution: a moment of compassion preserved in bone at 1.77 million years old.

The Medieval City Above

The upper layers of Dmanisi contain the ruins of a medieval Georgian city of the same name, occupied from approximately the 6th century AD until its destruction by Tamerlane in the late 14th century. The ruins include a citadel, a basilica church (6th century), palace foundations, bathhouses, and extensive residential areas. The city was an important trade centre on the route between Tbilisi and the south. It was the coincidence of excavating the medieval ruins that led to the accidental discovery of the hominin remains in the underlying volcanic sediment: archaeologists digging the basements of medieval buildings broke through into the ancient layer below.

Ongoing Research

Excavations at Dmanisi continue under the direction of the Georgian National Museum in collaboration with international partners. The site continues to yield new material: animal bones representing extinct species of sabertooth cat, giant cheetah, and ancestral forms of deer, horse, and giraffe provide a picture of the landscape that early humans entered when they arrived in the Caucasus. The question of whether additional hominin material remains to be found — and what it might tell us about variation within the Dmanisi population — keeps the site active and watched closely by researchers worldwide.

Visiting Dmanisi

The Dmanisi site is located near the village of Patara Dmanisi, approximately 93 km from Tbilisi. The site includes an on-site museum with replicas of the skulls and information about the excavations; the original skulls and bones are displayed at the Georgian National Museum in central Tbilisi (Shota Rustaveli Avenue 3) in a purpose-built exhibition. Combined with a visit to the Tbilisi museum, a day trip to Dmanisi makes one of the most intellectually rewarding heritage journeys in the Caucasus. Public transport is limited; most visitors travel by hired car or taxi from Tbilisi.

Sources & Resources

• Wikipedia: Dmanisi
• Georgian National Museum — Dmanisi Collection
• Lordkipanidze et al., “A Complete Skull from Dmanisi, Georgia, and the Evolutionary Biology of Early Homo”, Science 342 (2013)
• Lordkipanidze et al., “Postcranial evidence from early Homo from Dmanisi, Georgia”, Nature 449 (2007)