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Discovery of Early Human Tools Hint at Earlier Start

SternisheFan writes in with a story about early humans passing down their tool making skills. "Sophisticated bladelets suggest that humans passed on their technological skill down the generations. A haul of stone blades from a cave in South Africa suggests that early humans were already masters of complex technology more than 70,000 years ago . The tiny blades — no more than about 3 centimeters long on average — were probably used as tips for throwable spears, or as spiky additions to club-like weapons, says Curtis Marean, an archaeologist at Arizona State University in Tempe who led the team that found the bladelets. Twenty-seven such blades, called microliths by archaeologists, were found in layers of sand and soil dating as far back as 71,000 years ago and representing a time-span of about 11,000 years, showing how long humans were manufacturing the blades. Clever crafters The find lends credence to the idea that early humans were capable of passing on their clever ideas to the next generation of artisans, creating complex technologies that endured over time. John Shea, a palaeoanthropologist at Stony Brook University in New York, says that it also suggests that 'previous hypotheses that 'early' Homo sapiens differed from 'modern' ones in these respects are probably wrong'."

16 of 109 comments (clear)

  1. Mmmmnnn... by Black+Parrot · · Score: 5, Interesting

    Wikipedia has an interesting article on http://en.wikipedia.org/wiki/Behavioral_modernity , which indicates that there are two schools of thought on this, which I'll call the gradualists and suddenists. The suddenists think Something Wonderful Happened ~50,000 years ago, so this discovery will make them have to move their date earlier. However, the gradualists think there are signs of modern behavior much earlier, so this news won't make them rethink anything. (Most likely they'll just say ITYS.)

    IMO the suddenists are following the same kind of thinking that made people think Neanderthals were dumb brutes, that we're a lot more different than animals than we really are, etc. ISTM that there has always been some kind of ... prejudice? conceit? ... that makes a lot of people assume that we're a lot more special than we actually are.

    --
    Sheesh, evil *and* a jerk. -- Jade
    1. Re:Mmmmnnn... by SternisheFan · · Score: 4, Informative
      Quoting from your Wikipedia link...

      "Behavioral modernity is a term used in anthropology, archeology and sociology to refer to a set of traits that distinguish present day humans and their recent ancestors from both other living primates and other extinct hominid lineages. It is the point at which Homo sapiens began to demonstrate an ability to use complex symbolic thought and express cultural creativity. These developments are often thought to be associated with the origin of language. [1] There are two main theories regarding when modern human behavior emerged. [2] One theory holds that behavioral modernity occurred as a sudden event some 50 kya (50,000 years ago) in prehistory, possibly as a result of a major genetic mutation or as a result of a biological reorganization of the brain that led to the emergence of modern human natural languages. [3] Proponents of this theory refer to this event as the Great Leap Forward [4] or the Upper Paleolithic Revolution. The second theory holds that there was never any single technological or cognitive revolution. Proponents of this view argue that modern human behavior is the result of the gradual accumulation of knowledge, skills and culture occurring over hundreds of thousands of years of human evolution. [5] Proponents of this view include Stephen Oppenheimer in his book Out of Eden, and John Skoyles and Dorion Sagan in their book Up from Dragons: The evolution of human intelligence."

    2. Re:Mmmmnnn... by antifoidulus · · Score: 4, Funny

      The suddenists think Something Wonderful Happened ~50,000 years ago,

      I think they are off by an order of magnitude, extant evidence shows that brewing alcohol only started about 10,000 years ago.

    3. Re:Mmmmnnn... by Black+Parrot · · Score: 3, Funny

      The suddenists think Something Wonderful Happened ~50,000 years ago,

      I think they are off by an order of magnitude, extant evidence shows that brewing alcohol only started about 10,000 years ago.

      And the first Slashdotter got laid a mere three weeks ago!

      --
      Sheesh, evil *and* a jerk. -- Jade
    4. Re:Mmmmnnn... by artor3 · · Score: 4, Insightful

      Well that's a very dismissive attitude. You're not arguing with creationists here, so drop the condescension.

      The fact is that there is a (relatively) sudden appearance of things we associate with modern thought (e.g. decoration, advanced tools, explosive population and migration) around 50 kya. I say relatively, because we're still talking about a span of tens of thousands of years. Humanity had been nearly exterminated around 70 kya, so it's entirely reasonable to think that those who survived made major evolutionary leaps -- or, put a better way, those who survived did so because of those leaps.

      That humans were making tools even before then is not "news". For example, we're pretty sure that fire was first mastered not by Homo sapiens, but by Homo erectus, hundreds of thousands of years before anatomically modern humans even existed. Homo erectus lasted for longer than modern humans have, and at the rate we're going, they'll probably end up having lived for longer on Earth than our species. But they never developed a civilization like ours, despite their million years of existence. It seems evident from that that a species can have advanced toolmaking (e.g. fire) without reaching the level of modern human intelligence.

  2. Re:You lost your election again to the two party s by Black+Parrot · · Score: 4, Insightful

    I wonder if Teh Management would consider truncating AC posts to a shorter "Read the rest of this comment" than the above.

    Like maybe, 10 lines. If they're actually saying something relevant and interesting (which they often do), it would still be easy enough to click the link.

    --
    Sheesh, evil *and* a jerk. -- Jade
  3. Really well organized by symbolset · · Score: 3, Funny

    They only lost one bladelet every 400 years. Maybe they could help me find my car keys.

    --
    Help stamp out iliturcy.
  4. Re:Clever crafters by Taco+Cowboy · · Score: 3, Interesting

    The find lends credence to the idea that early humans were capable of passing on their clever ideas to the next generation

    Why is that so surprising ?
     
    Many other types of animal regularly pass on "knowledges" from one generation to the next - humans are not the only one capable of doing that.
     
    I've seen little sparrows squatting on sand so to trap fine grain sand with their down feather and then carrying the sand back to their nests.
     

    --
    Muchas Gracias, Señor Edward Snowden !
  5. Time perspective by RedBear · · Score: 5, Interesting

    More and more in the last decade or so I have seen things that lead me to believe that humans have been basically modern humans for approximately 200,000 years. That's how far back our ancestors have been traced through our mitochondrial DNA. I have no doubt that in coming decades there will be new discoveries that will keep pushing the dates of "modern" human behavior further and further back.

    This is a fascinating concept to me because it means the human race and basic forms of human civilization have been around for an incredibly long time. Basic concepts like languages, writing systems, trading, counting, money, philosophy, astronomy, martial arts and many other things have probably been invented, forgotten and reinvented hundreds of times by individual geniuses over the course of those 200,000 years. All the sci-fi stories I've ever read where it's seen as some amazing thing that an alien race has been around for more than a hundred thousand years... Well, the human race proves that's really not that amazing. Or, conversely, that the human race is equally as amazing as those "ancient" alien races. In fact, we could be considered one of those "ancient" alien races, from the perspective of an alien race.

    When I was younger, the concept was that just a few thousand years ago we were retarded cave men, and then suddenly civilization happened. Nowadays what I picture is more like endless millennia of fairly intelligent people living like Native Americans in many different ways, with pockets of even more modern cultures that rose and fell through the ages, until finally a few thousand years ago a few things like writing and math were (re)discovered and remembered and propagated to enough other humans that modern civilization exploded into being and had enough momentum and population to finally stick around, where it hadn't been able to "stick" before. I think it was basically luck that things didn't develop either ten thousand years earlier or ten thousand years later. All the basic elements seem to have been there for a looooooong time.

    Just my pet theory. I am not an anthropologist, obviously, just fascinated by the things that may have happened during early modern human history, which seems to extend much further back than what I was taught in grade school.

    1. Re:Time perspective by Coisiche · · Score: 3, Interesting

      Yes, I have often made the point about oil to friends making this claim because it seems unlikely that the civilizations could reach, or as some claim exceed, current technology levels without using fossil fuel.

      Those speculative civilizations also don't seem to have used nuclear fission for energy. Not just because there's no evidence of uranium sources being depleted before we discovered it, but it doesn't seem that the by-products from it have ever found as "naturally occurring".

  6. Re:Clever crafters by SternisheFan · · Score: 3, Informative

    Story submitter here, yes, I did do a copy/paste submission (using my smartphone, not exactly easy to do!), and after submitting this story noticed this too. I should've picked up on it. Please accept this alternate story link as a token ... http://news.discovery.com/human/early-human-tools-121107.html

  7. But stone tools are much older by Zorpheus · · Score: 4, Interesting

    According to wikipedia the oldest stone tools are 2.6 to 1.7 million years old: http://en.wikipedia.org/wiki/Oldowan
    So what is so special about this?

  8. Weapons, Military Advantage, War? by foma84 · · Score: 5, Interesting

    After reading TFA there is one thing that leaves me mighty confused.
    The only hypothesis made for these artifacts is that they were weapons or parts of bigger weapons, and that they led to a military advantage over neanderthals.
    TFA doesn't even consider any other possibile use for the bladelets, like being tools for skinning, carving or sculpting. Even the requirement of having developed complex language is secondary to the craftsmanship necessary for the bladelets.

    I've seen it is common among some anthropologists to consider the history of humanity in the same terms as the most recent history (last 6.000 years): in terms of war and contending parties. Is there anyone informed enough (more than me) about this topic that can tell if it is actually a trait of human history or an ideological bias?
    Thanks in advance.

  9. passed on their technological skill by Hognoxious · · Score: 3, Funny

    Sophisticated bladelets suggest that humans passed on their technological skill down the generations.

    Og: Ug look happy.
    Ug: Ug is happy!
    Og: Why Ug happy?
    Ug: Ug finish pay off student loan!

    --
    Confucius say, "Find worm in apple - bad. Find half a worm - worse."
  10. Re:Yes I did by drinkypoo · · Score: 3, Funny

    It's nice that you call that horse a woman.

    Wait, does one hoofbeat mean yes, or no?

    --
    "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  11. Re:Clever crafters by ColdWetDog · · Score: 4, Funny

    Fool! Smartphones and tablets are for CONSUMPTION only! No document creation or other complex intellectual tasks.

    You kids. In my day, we didn't even TRY to write anything until we had stabilized the CRTs and blown out all of the insects from the CPU (they liked the warmth).

    God, it all went downhill when Jobs allowed cut and paste on the iPhone. What was he thinking!

    --
    Faster! Faster! Faster would be better!