Did A Comet Impact Push Humans Into Technological Overdrive?

Article written: 25 Apr , 2017
Updated: 29 Apr , 2017
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About 14,500 years ago, Earth began transitioning from its cold, glacial self to a warmer interglacial state. However, partway through this period, temperatures suddenly returned to near-glacial conditions. This abrupt change (known as the Younger Dryas period) is believed by some to be the reason why hunter-gatherers started forming sedentary communities, farming, and laying the groundwork for civilization as we know it – aka. the Neolithic Revolution.

For over a decade, there have been scientists who have argued that this period was the result of a comet hitting Earth. Known as the Younger Dryas Impact Hypothesis (aka. the Clovis Comet Hypothesis), the theory is largely based on ice core samples from Greenland that show a sudden global temperature change. But according to a new study by a research team from the University of Edinburgh, archaeological evidence may also prove this hypothesis correct.

The Younger Dryas period takes its name from a species of flower known as Dryas octopetala. This plant is known to grow in cold conditions, and became common in Europe during the period. Because of the way it began abruptly – roughly 12,500 years ago – and then ended just as abruptly 1200 years later, many scientists are convinced it was caused by an external event.

Göbekli Tepe, structures A-D of the site, located in southern Turkey. Credit: Wikipedia Commons/Teomancimit

For the sake of their study – which was recently published in the journal Mediterranean Archaeology and Archaeometry under the title “Decoding Göbekli Tepe With Archaeoastronomy: What Does the Fox Say?“- the team found an astronomical link to the stone pillars at Göbekli Tepe. Located in southern Turkey, this archaeological find is the oldest known temple site in the world (dated to ca. 10,950 BCE).

This site, it should be noted, is contemporary with the Greenland ice core samples, which are dated to around 10,890 BCE. Of the sites many features, none are more famous than the many standing pillars that dot the excavated grounds. This is because of the extensive pictograms and animal reliefs that decorate these pillars, which include various representations of mammal and avian species- particularly vultures.

Pillar 43, which is also known as the “vulture stone”, was of particular interest to archeologists, as it is suspected that its representations (associated with death) could have been intended to commemorate a devastating event. The other images, they ventured, were meant to depict the constellations, and that their placement relative to each other accorded to the positions of the then-known asterisms in the night sky.

This theory was based on images they took of the site, which they then examined using the planetarium program stellarium 0.15. In the end, they found that the images bore a resemblance to constellations that would have been visible in 10,950 BCE. As such, they concluded that the temple site may have been an observatory, and that the images were a catalog of celestial events – which include the Taurid meteor stream.

Wall pillars with three animal symbols in series. Part a) is pillar 2 from Enclosure A, while part b) is pillar 38, Enclosure D. Credit: Travel The Unknown

As they state in their study:

“We begin by noting the carving of a scorpion on pillar 43, a well -known zodiacal symbol for Scorpius. Based on this observation, we investigate to what extent other symbols on pillar 43 can be interpreted as zodiacal symbols or other familiar astronomical symbols… We suggest the vulture/eagle on pillar 43 can be interpreted as the ‘teapot’ asterism of our present-day notion of Sagittarius; the angle between the eagle/vulture’s head and wings, in particular, agrees well with the ‘handle’,‘lid’ and ‘spout’ of the teapot asterism. We also suggest the ‘bent-bird’ with downward wriggling snake or fish can be interpreted as the ‘13th sign of the zodiac’, i.e. of our present-day notion of Ophiuchus. Although its relative position is not very accurate, we suggest the artist(s) of pillar 43 were constrained by the shape of the pillar. These symbols are a reasonably good match with their corresponding asterisms, and they all appear to be in approximately the correct relative locations.

Similarly, they suggest that a carved circle at the center of pillar 43 could be interpreted as the Sun. They call this image the “date stamp” because it can be seen as communicating a specific date by indicating which part of the zodiac the Sun was in at the time of carving. By comparing the age of the site (based on carbon dating) to the apparent position of the Sun, they found that it was consistent with the Summer solstice of 10,950 BCE.

Of course, the team fully acknowledges that an astronomical interpretation is by no means the only possibility. In addition to the possibility of them being mythological references, they could also be representations of hunting or migration patterns. It’s also entirely possible they were not meant to convey any specific meaning, and were merely a description of the local environment, which would have been rich in flora and fauna at the time.

Pillar 43, Enclosure D, also known as the Vulture Stone of Göbekli Tepe. Credit: Martin B. Sweatman and Dimitrios Tsikritsis

In addition, the way vultures are commonly featured could be an indication that the site was a burial ground. This is consistent with iconography found at the archaeological sites of Çatalhöyük (in central, southern Turkey) and Jericho (in the West Bank). During the time period in question, Neolithic peoples were known to conduct sky burials, where the bodies of the deceased were left out in the open for carrion birds to pick over.

In such practices, the head was sometimes removed from the deceased and kept (for the sake of ancestor worship). This is consistent with one of the characters on Pillar 43, which appears to be a headless human. However, as the team go on to explain, they are confident that the connection between the site’s images and the Taurid meteor stream is a plausible one.

“[O]ur basic statistical analysis indicates our astronomical interpretation is very likely to be correct,” they write. “We are therefore content to limit ourselves to this hypothesis, and logically we are not required to pursue others.” And of course, they acknowledge that further research will be necessary before any conclusions can be made.

Despite the availability of other (and perhaps more plausible) explanations, one has to admit that the astronomical theory is appealing. Civilization as we know it being a response to a meteor impact, and ancient people cataloging it in their stone carvings. It’s got a real Deep Impact meets 2001: A Space Odyssey feel to it!

Further Reading: MAA Journal

Matt Williams is the Curator of Universe Today’s Guide to Space. He is also a freelance writer, a science fiction author and a Taekwon-Do instructor. He lives with his family on Vancouver Island in beautiful British Columbia.

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7 Responses

  1. Nexus says

    Hmm… seems a little speculative to me. Guess we’ll find out more when other parts of Gobekli Tepe are excavated.

  2. Torbjörn Larsson says

    If we check the context here, we can see that the recurring 14.5 kyrs impact hypothesis has been rejected by geologists any number of times and is seen as pseudoscience. “The hypothesis has been contested by research showing that most of the conclusions cannot be repeated by other scientists, and criticized because of misinterpretation of data and the lack of confirmatory evidence. [ https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis ]”

    Archaeoastronomy, a sorts integrative social field and not astronomy as such, does not fare much better. “Archaeoastronomy owes something of this poor reputation among scholars to its occasional misuse to advance a range of pseudo-historical accounts. [ https://en.wikipedia.org/wiki/Archaeoastronomy#Fringe_archaeoastronomy ]”

  3. Manu says

    “We are therefore content to limit ourselves to this hypothesis, and logically we are not required to pursue others.”
    Wow!!! Karl Popper must have shuddered in his grave at this.

    I love and respect archaeology, but it should really stick to testable hypotheses, just like any other area of science. In the absence of written sources, ancient peoples *intentions* are not part of what’s testable.

  4. Member
    Aqua4U says

    Not mentioned in the above article is the finding of ubiquitous shocked quartz, micro diamonds and an Iridium layer found across North America which points to a huge astronomical impact or explosion. These have been found as far away as San Diego. Another and perhaps the most disturbing find is an ash layer dated to the same era indicating that 3/4 or more of the surface of North America was vaporized. Mega fauna animals and the Clovis people disappeared about the same time. On the borders of the Chesapeake Bay and in other places there are thick deposits of ash and dust assumed to have accumulated after transported by wind across a lifeless landscape such as what would happen if ALL the surface of the earth were burnt.

    One argument used against the impact theory is that there are no large craters in North America dated to that time period. A counter argument states that an air burst explosion could explain that absence.

    • Member
      Aqua4U says

      The evidence for a tremendous asteroid or cometary air burst/impact continues to accumulate… looking for a smoking gun?

      Then again.. a SciFi short story topic as follows: Some 13,000 years ago Earth was visited by an extraterrestrial space fairing civilization. They came here to examine how life has developed on our planet and gather raw materials so they might continue their journey. They survey and find primitive humans interesting and useful. It is decided to use them as slave labor to extract the minerals required to continue their interstellar journey. The humans eventually rebel and kill many in the landing party(s). In retaliation the aliens redirect a comet which hits North America near the site of their landing.. KABOOM! Cha!

      • BCstargazer says

        bam…no copyright therefore the “ancient aliens” wahoos just stole your idea 😉

      • Jim Krug says

        I don’t think we should necessarily assume that story is merely science fiction, as it would be consistent with what we actually see in the records of early civilizations, and we have multiple civilizations from all around the world telling very similar stories.

        Back to the article- Matt, this was a good one as always, but it may have worked even better if you just made it a stand-alone article on Gobleki Tepe. It seemed like there was a little bit of a link to the comet impact early in the article, but the Gobleki Tepe finds could’ve stood on their own merit.

        Still, great work as always!

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