Comment by thinkingtoilet 5 days ago
That's wild! Thanks for sharing. I didn't realize these things went so far back. So are you saying these were straight up non-human primates using tools? Or is this all traceable to our lineage?
Last I knew, the 3.3 mya evidence from the site Lomekwi 3 in Kenya was debatable, though a serious possibility, and the 2.58 mya evidence from the Olduvai Gorge in Tanzania was considered the sure thing.
Also, more than primates use tools: Many corvids (crows, ravens, etc.) do, as do other animals. Look up New Caledonian Crows in particular.
But don't take all this from HN commenters debating each other; find some authoritative sources. A recent review article in a scientific journal would be a great start. Google Scholar lets you search for review articles.
Most recently (January 19, 2026): cows
>Flexible use of a multi-purpose tool by a cow
https://www.cell.com/current-biology/fulltext/S0960-9822(25)...
Did they look like this?
https://en.wikipedia.org/wiki/Cow_tools#/media/File:Cow_Tool...
That's a difficult distinction to make - at which point does tool selection differ from modification for use as a tool - any animal that strips the leaves off a twig in order to use it as a tool has manufactured the tool.
The people of the Olduvan industry from 2.58 mya tools (the earliest accepted by consensus [0]) manufactured their tools - that's exactly what archaeologists are talking about.
Chimps and New Caledonian Crows (and maybe some other animals) also manufacture their tools, at least sometimes, BTW. IIRC the crows strip sticks and bend them into hooks to grab at objects.
Why would someone imply otherwise if they don't know? What are people trying to prove in this discussion?
[0] There's strong evidence of 3.3 mya; see other comments.
I believe the evidence is animal bones that show marks from butchery, as well as actual sharpened stone flakes and other things found primarily in what is now Kenya: https://en.wikipedia.org/wiki/Lomekwi
Even today there's plenty of non humans (and non-primate) tool use https://en.wikipedia.org/wiki/Tool_use_by_non-humans.
In terms of tools by homonins, there is a roughly ~3million year history of stone tool use by various species, and the main thing preventing that date from being pushed further back is the difficulty in discerning between stones that have been shaped intentionally and those shaped by natural forces.
Our last common ancestor with our closest non-human primates (Pan genus) diverged about 6-8 million years ago, so what constitutes “human” is murky and I don’t think archaeologists give the matter much thought. “Human” means homo sapiens, “archaic human” means a few subspecies like neanderthals up to about 600 kYA, and the rest are just “hominins”.
We have both observational and archaeological evidence of tool use in chimpanzees, macaques, and capuchins so it’s a pretty widespread behavior. I think the archaeological evidence for monkeys only goes back about four thousand years but thats because we havent studied the issue as much in archaeology.
The first identified tools were 3.3 million years ago, which is before the homo genus emerges. Thus, those were either by Australopithecus afarensis or by a yet unidentified hominid species -- they were still very likely our ancestors (but technically TBD).
Then around 2-2.5 million years ago you get the first homo species in the genus homo such as Homo habilis and they created the Oldowan tool culture.
Both Australopithecus afarensis and Homo habilis are our ancestors -- however they are also the ancestors of other homo lines that diverged from us that we are not descendents of (which are now extinct).
People often forget how widespread and varied the Homo genus was before all our cousin species went extinct (likely in part due to us).[1] Homo erectus colonized the entire old world very effectively 1.5 million years ago!
[1] https://en.wikipedia.org/wiki/Homo#/media/File:The_hominin_f...