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Evolution · Natural sciences

Yohannes Haile-Selassie

He didn’t rewrite human origins — he anchored them in Afar rock with type specimens and field leadership.

Worth your time?4/5Yes.Study the whole thing.What works, what does not, who it is for ↓
11:06in productionCh. 1 · Type Specimens, 1997/ 11:06 · ceiling 15 min
4 chapters · 11:06Ceiling 15:00

The brief is written and checked. The video joins this page when it is cut.4 chapters · 1 min read · 11:06 planned

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Yohannes Haile-Selassie’s work delivers concrete, geographically anchored fossil discoveries — not interpretations. His contribution is taxonomic and logistical: type specimens, long-term field leadership, and documented publications. Nothing in the sources supports claims about locomotion, diet, cognition, or evolutionary transitions.

EvolutionNatural sciencesEast AfricaEvolutionPalaeontologyEast Africa across the network →
Chapters & takeaways4
  1. 0:56
    Type Specimens, 1997

    He discovered the defining fossils for two new hominin species in 1997.

  2. 3:10
    Across the Hominin Tree

    He found fossils spanning four hominin taxa — from Ardipithecus to Homo sapiens.

  3. 5:11
    Woranso-Mille Project

    Since 2004, his team has dug in Mille woreda — ground zero for later finds.

  4. 7:30
    Kadanuumuu, 2010

    Kadanuumuu was described in a June 2010 paper — one of many Afar specimens his group found.

1 more chapterFewer chapters
Worth your time?

Yes. Study the whole thing.

4/ 5
What works
  • anchors two type specimens in 1997
  • documents sustained field leadership since 2004
  • publishes Kadanuumuu in 2010 with clear provenance
  • recovers fossils across multiple hominin taxa
What does not
  • establish evolutionary mechanisms
  • provide dating methods
  • quantify sample sizes or confidence intervals
  • describe associated artefacts or fauna
Study it if
  • researchers needing primary fossil provenance
  • educators seeking verified Ethiopian fieldwork examples
  • students mapping hominin taxonomy to geography and time
Skip it if
  • readers seeking behavioural inferences
  • those looking for consensus or controversy around these taxa
  • anyone expecting phylogenetic diagrams or adaptive narratives
Who should study it, and who should skipHide who it is for
The written brief1 min read

What the work claims

The work claims no hypotheses, interpretations, or evolutionary narratives. It reports fossil discoveries: type specimens for two species, plus additional specimens across four hominin genera/species, all from Ethiopia’s Afar Region.

How it was done

He discovered the type specimens for Australopithecus garhi and Ardipithecus kadabba in 1997. He has led digs in the Mille woreda of the Afar Region of Ethiopia since 2004. He published a paper in June 2010 describing Kadanuumuu, a specimen found in Afar.

What holds up

The discovery of the type specimens for Australopithecus garhi and Ardipithecus kadabba in 1997 is verified. His leadership of the Woranso-Mille Project since 2004 is verified. His description of Kadanuumuu in a June 2010 publication is verified. His recovery of fossil specimens of Ardipithecus ramidus, Australopithecus afarensis, Homo erectus, and Homo sapiens is verified.

What does not

The sources do not establish how these fossils were dated, whether they were associated with tools or cut marks, or how they relate to each other chronologically or phylogenetically. No sample sizes, error margins, or statistical support are given.

Why it matters beyond the lab

These finds populate the African fossil record at critical temporal junctures. But the sources do not state their functional, behavioural, or adaptive implications — only their taxonomic and geographic placement.

Is it worth your time

Yes — his fieldwork anchors key taxonomic references in human evolution. But the brief does not assess dating methods, phylogenetic analyses, or comparative anatomy from the sources. It reports only what was found, where, and when.

Same field · Evolution4 of 69
11:01
Tim D. White1950Tim D. White’s fieldwork produced two high-impact, precisely dated hominin fossils—Ardipithecus ramidus (4.4 Ma) and Australopithecus garhi (2.5 Ma)—that constrain evolutionary models with empirical evidence, not conjecture.
13:00
Lucy (hominid)1974Donald Johanson found roughly 40 percent of a single hominin skeleton at Hadar, Ethiopia, in November 1974, later named Lucy and classified as Australopithecus afarensis, dated to about 3.2 million years old using argon-argon dating of surrounding volcanic ash. Her pelvis, a valgus knee angle and a curved lower spine all point clearly to habitual upright walking, at a time when her skull remained small and ape-like, evidence that bipedalism evolved well before the brain size associated with later humans grew. Her arms were proportionally longer relative to her legs than in modern humans, and features of her ribs and fingers have led some researchers to argue Australopithecus afarensis still spent meaningful time in trees, a claim that remains debated. A 2016 study proposing that Lucy herself died from a fall out of a tree was disputed by Johanson and fellow researcher Tim White, illustrating that even her own cause of death is not a settled matter.
10:12
Lee Berger (paleoanthropologist)1965Berger’s work established two new hominin species through open-access fieldwork and mass collaboration — not consensus or proof, but reproducible process and peer-reviewed morphological description.
11:04
Richard Leakey1944–2022Leakey's fieldwork produced five benchmark fossils that collectively anchor early Homo and Australopithecus species in East Africa — but no claim about lineage, behaviour, or inevitability follows from them alone.
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