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Evolution
Meave Leakey
A flat-faced skull from Kenya shattered the illusion of a tidy human family tree.
Meave Leakey’s 1999 discovery at Lake Turkana introduced Kenyanthropus platyops — a flat-faced, 3.5-million-year-old hominin that challenged assumptions about early human diversity.
The find was made by Leakey’s team at Lake Turkana, Kenya, in 1999.
2:35
What they found
They unearthed a 3.5-million-year-old skull and partial jaw interpreted as a new branch of the early human family.
4:31
What they called it
Meave Leakey named it Kenyanthropus platyops — 'flat-faced man of Kenya'.
6:26
Why it split the tree
This was not just another Australopithecus — it was proposed as a distinct, contemporaneous lineage.
Worth your time?
Yes. Study the whole thing.
4/ 5
What works
introduces a credible alternative hominin lineage
anchors morphology to a precise time and place
forces re-evaluation of adaptive variation in Pliocene hominins
What does not
establish ancestry
confirm phylogenetic position
refute Australopithecus afarensis as sole contemporary hominin
Study it if
palaeoanthropologists
students of human origins
anyone questioning linear narratives of evolution
Skip it if
those seeking medical or technological applications
readers expecting consensus or resolution
The written brief1 min read
What the work claims
The skull and partial jaw represent a new branch of the early human family.
How it was done
Leakey’s research team made the discovery at Lake Turkana, Kenya, in 1999.
What holds up
The age (3.5 million years), location (Lake Turkana, Kenya), and naming of Kenyanthropus platyops are all verified claims from the source.
What does not
The document does not establish whether Kenyanthropus platyops is a direct human ancestor, nor does it confirm its evolutionary relationship to Australopithecus afarensis or Homo.
Why it matters beyond the lab
It challenges the idea of a single, linear path in early human evolution — suggesting coexistence and morphological experimentation among hominins in east Africa.
Is it worth your time
Yes — it introduces a competing hominin lineage at a critical time in human evolution, forcing reassessment of diversity and adaptation 3.5 million years ago.