Definition
Homo habilis is the earliest widely-accepted species of the genus Homo, named in 1964 by Louis Leakey, Phillip Tobias, and John Napier from fossils at Olduvai Gorge. The species lived in East Africa roughly 2.4 to 1.5 million years ago and overlapped substantially with Paranthropus and with the earliest Homo erectus.
Compared with australopiths, H. habilis has a slightly larger brain (~510–700 cc), a less projecting face, smaller postcanine teeth, and a more globular braincase. Postcranially it remained small-bodied with relatively long arms, retaining some climbing adaptations. The name 'handy man' reflects the original interpretation that this species made the Oldowan stone tools found in the same deposits.
Why it matters
Where it shows up
The type specimen, OH 7, is a juvenile partial skull and hand bones from Olduvai Bed I. Other key fossils include OH 24 (a partial cranium), KNM-ER 1813 (a small cranium), and KNM-ER 1470 (a larger cranium often assigned to H. rudolfensis). Most specimens come from East African sites in Tanzania, Kenya, and Ethiopia.
The combination of habilis fossils with Oldowan tools and butchered bones at sites like FLK Zinj at Olduvai forms the classic picture of early Homo behaviour — small camps where stone tools were used to process carcass parts. How much of that behaviour was hunting versus scavenging remains debated.