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This ancient rock is changing our theory on the origin of life | Tara Djokic

This ancient rock is changing our theory on the origin of life | Tara Djokic


The Earth is 4.6 billion years old, but a human lifetime often lasts
for less than 100 years. So why care about
the history of our planet when the distant past seems
so inconsequential to everyday life? You see, as far as we can tell, Earth is the only planet
in our solar system known to have sparked life, and the only system able to provide
life support for human beings. So why Earth? We know Earth is unique
for having plate tectonics, liquid water on its surface and an oxygen-rich atmosphere. But this has not always been the case, and we know this because ancient rocks
have recorded the pivotal moments in Earth’s planetary evolution. And one of the best places
to observe those ancient rocks is in the Pilbara of Western Australia. The rocks here are 3.5 billion years old, and they contain some of the oldest
evidence for life on the planet. Now, often when we think of early life, we might imagine a stegosaurus or maybe a fish crawling onto land. But the early life that I’m talking about is simple microscopic life, like bacteria. And their fossils are often preserved
as layered rock structures, called stromatolites. This simple form of life
is almost all we see in the fossil record for the first three billion years
of life on Earth. Our species can only be traced
back in the fossil record to a few hundred thousand years ago. We know from the fossil record, bacteria life had grabbed
a strong foothold by about 3.5 to four billion years ago. The rocks older than this
have been either destroyed or highly deformed
through plate tectonics. So what remains a missing
piece of the puzzle is exactly when and how
life on Earth began. Here again is that ancient
volcanic landscape in the Pilbara. Little did I know that our research here
would provide another clue to that origin-of-life puzzle. It was on my first field trip here, toward the end of a full,
long week mapping project, that I came across something
rather special. Now, what probably looks like
a bunch of wrinkly old rocks are actually stromatolites. And at the center of this mound
was a small, peculiar rock about the size of a child’s hand. It took six months before we inspected
this rock under a microscope, when one of my mentors
at the time, Malcolm Walter, suggested the rock resembled geyserite. Geyserite is a rock type that only forms in and around the edges
of hot spring pools. Now, in order for you to understand
the significance of geyserite, I need to take you back
a couple of centuries. In 1871, in a letter
to his friend Joseph Hooker, Charles Darwin suggested: “What if life started
in some warm little pond with all sort of chemicals still ready to undergo
more complex changes?” Well, we know of warm little ponds.
We call them “hot springs.” In these environments, you have hot water dissolving minerals
from the underlying rocks. This solution mixes with organic compounds and results in a kind of chemical factory, which researchers have shown
can manufacture simple cellular structures that are the first steps toward life. But 100 years after Darwin’s letter, deep-sea hydrothermal vents, or hot vents,
were discovered in the ocean. And these are also chemical factories. This one is located along
the Tonga volcanic arc, 1,100 meters below sea level
in the Pacific Ocean. The black smoke that you see billowing
out of these chimneylike structures is also mineral-rich fluid, which is being fed off by bacteria. And since the discovery
of these deep-sea vents, the favored scenario for an origin of life
has been in the ocean. And this is for good reason: deep-sea vents are well-known
in the ancient rock record, and it’s thought that the early Earth
had a global ocean and very little land surface. So the probability that deep-sea vents
were abundant on the very early Earth fits well with an origin of life in the ocean. However … our research in the Pilbara
provides and supports an alternative perspective. After three years, finally, we were
able to show that, in fact, our little rock was geyserite. So this conclusion suggested
not only did hot springs exist in our 3.5 billion-year-old
volcano in the Pilbara, but it pushed back evidence for life
living on land in hot springs in the geological record of Earth by three billion years. And so, from a geological perspective, Darwin’s warm little pond
is a reasonable origin-of-life candidate. Of course, it’s still debatable
how life began on Earth, and it probably always will be. But it is clear that it’s flourished; it has diversified, and it has become ever more complex. Eventually, it reached
the age of the human, a species that has begun
to question its own existence and the existence of life elsewhere: Is there a cosmic community
waiting to connect with us, or are we all there is? A clue to this puzzle again
comes from the ancient rock record. At about 2.5 billion years ago, there is evidence that bacteria
had begun to produce oxygen, kind of like plants do today. Geologists refer to
the period that followed as the Great Oxidation Event. It is implied from rocks
called banded iron formations, many of which can be observed as
hundreds-of-meter-thick packages of rock which are exposed in gorges that carve their way through
the Karijini National Park in Western Australia. The arrival of free oxygen allowed
two major changes to occur on our planet. First, it allowed complex life to evolve. You see, life needs oxygen
to get big and complex. And it produced the ozone layer,
which protects modern life from the harmful effects
of the sun’s UVB radiation. So in an ironic twist, microbial life
made way for complex life, and in essence, relinquished
its three-billion-year reign over the planet. Today, we humans dig up
fossilized complex life and burn it for fuel. This practice pumps vast amounts
of carbon dioxide into the atmosphere, and like our microbial predecessors, we have begun to make
substantial changes to our planet. And the effects of those
are encompassed by global warming. Unfortunately, the ironic twist here
could see the demise of humanity. And so maybe the reason
we aren’t connecting with life elsewhere, intelligent life elsewhere, is that once it evolves, it extinguishes itself quickly. If the rocks could talk, I suspect they might say this: life on Earth is precious. It is the product of
four or so billion years of a delicate and complex co-evolution between life and Earth, of which humans only represent
the very last speck of time. You can use this information
as a guide or a forecast — or an explanation as to why it seems
so lonely in this part of the galaxy. But use it to gain some perspective about the legacy that you
want to leave behind on the planet that you call home. Thank you. (Applause)

100 comments on “This ancient rock is changing our theory on the origin of life | Tara Djokic

  1. This lady is well spoken and easy to understand. But BS is Be no matter how pretty the cart sounds. There is zero evidence no life produced life. Period

  2. Good information.. just needed a bit more character.. less monotone and a bit more passion and excitement in her voice would've been perfect

  3. This seems like climate activism disguised as science. As far as I know there is no real scientific consensus of global warming and CO2 being the culprit.

  4. Really? Climate change is going to kill us before nukes or some other invention of war or AI? Get real. So, the oceans are going to rise and swallow every last person on the highest mountain? Fanatic.

  5. It is very likely that in a few years, SCIENCE would be the only religion practiced across the globe; I feel it'll create more harmony and empathy in our world. 🙂

  6. I don't want to believe this theory she is saying for 3 billion years we were microbial forms the originator of time won't wait for so long .rather proof show that adam and Noah came after not so long after the creation of universe now people will ask me what is rhe proof of god the proof is that you know that time will run for eternity and you will die you know that you don't want to die forever but it must be a supernatural cause or life and consciousness himself who will give you life after death that consciousness is god and smart dumb people will still deny this eternal cycle of life and death .

  7. We haven’t evolved from monkeys and came down from trees. We were intelligently designed by something else superior to us.

  8. One strange thing is the amount of water that appears on earth. Originally there was no water, and even if there were falldown/comets/ice..the amount is just huge. The impacts are one thing, and why , but traces are hard to find from collisions. It is possible that life did not start here, on a microscopic level as we dont know how the enormous amount of water came here. ( earth originally was a burning sphere and then suddenly in earths history, water appears from nowhere).

  9. Of course your theory is changing (as usual). That's because evolution/big bang theory is a moving target, while creationism is a consistent solid rock. Quit being brainwashed and get with the program, people!

  10. She’s full of crap! We’re a young earth! Flat and defiantly Not a spinning blue ball! NASA and they’re deceived liars have been manipulating our reality for decades, their scientism is nonsense!

  11. If a thermal vent or hot spring can make life then why can’t smart man? They always say they have but fail to admit that they used a part or pieces of life already. If ur so smart really create life on the cellular level without any previous living parts at all. Not even frame work or code just the raw elements.

  12. I could sit and listen to her describe her ideas and theories for hours. Very powerful language to describe the bigger picture….. or what we can imagine.

  13. White people wear dresses only before 800 years only .first you search your generation when you wear dress ,cooking etc ok .Ancient Asian are dumbing but your generation just few hundreds years join the decent human beings ,you are try to dominate the world and snub Asians .

  14. Global warming was not MAN made and we are actually heading into a global cooling…… check out Adapt 2030 and do your own Research as well

  15. Carbon dioxide does NOT CAUSE CLIMATE CHANGE. STOP THIS BULLSHIT. Climate change is a natural process caused by a multitude of factors, none of which includes carbon dioxide, which is a necessary plant food. I am sick to death of rubbish like this polluting peoples' minds with corrupt misinformation.

  16. That was brilliant💎…ive been rock and mineral hounding for almost a year and ive added all of the rocks and crystals ive found to my landscape at home..i will pick some from time to time to tumble and others i give to neighbors and share what Gaia has formed over the centuries..all of these specimens are millions of years old and each rock has a story to tell..i do believe this..great talk and very well put together🤓

  17. It is a shame that she is not really well versed in ancient atmospheres.

    back in days of the dinosaurs, CO2 levels were in the thousands of PPM, plants, that use COS as food, grew to huge proportions and fed the huge animals.
    now that plants are starved for CO2, they grow slowly and barely feed the human population.
    maybe Man is restoring the atmospheres to it's pre-cambrian days and we will see the planet flourish, creating a much simpler and easier life for mankind.
    She also did not mention that we are living in an Ice Age, we have not come out of the current ice age into a warm period.
    I wonder what will happen to life on the planet when we see, yet another cycle from ice age to warm period ?

  18. God laughs when He hears this. We are so smart thinking the earth is millions of years old. God formed the earth from space material that was millions of years old and He did it 6900. Years ago

  19. Ok lady you put your smug foot in your mouth. You said we are changing the earth by our carbon out put. The rise in carbon levels is by under sea volcanism. Ice core samples prove that carbon levels rose just before the last ice age. There were no factories or automobiles. You must be getting paid by the globalist to spread their BS. Lots of scientists pimp out their credentials for the highest bidder

  20. Another global warming nut. Tell me scientists. For the minute 1 degree increase in the past 100 years in global temperature, what ratio of solar cycle changes to human fuel production is the cause. Show your work. (Hint. None of these 'scientists' can do this).

  21. Her pauses and speed of narration is making the presentation a bit different…. In a very good and mystical manner…

  22. Hold on..
    It all started with micro organisms…
    We ourselves have millions of microorganisms inside us, forming us in a way.
    So would the next step be us joining and being one with one being? Or has that happened already and that is planet earth…
    Wait what if earth is a being, and we are it's microorganisms.. Though we are the cancer that will kill it..

    Now if earth is a being, it is still evolving..and would the emergence of machine bring about the evolution now for just us, but for the planet too, thus evolving it.. I see it eventually becoming a dead vessel that is still maintained.. Like how maggots feed on a dead corpse..

  23. Another lecture on global warming. Thanks. The title was about the origin of life. Stick to the subject matter and piss off on the global warming lectures.

  24. If the theory of evolution is true that man came from apes then why is it my neighbor looks like a horse?? 😁😁😁😁

  25. I think we know the point of her talk: it’s about global warming. It’s subtle fear mongering about global warming disguised as another topic.

    (Paraphrased)
    “Bacteria 🦠 interacted with its environment, released oxygen, making way for more advanced life. Microscopic life relinquished it’s reign over the planet 🌎. The advanced life(humans) are now interacting with the environment and could result in our demise like the bacteria.”

    There a problem with that analogy. What does relinquishing it’s reign mean? Just because microscopic life made way to humans, doesn’t mean they relinquished their reign and died out. Microscopic life is STILL here, woman.

    I believe that humans are having SOME impact on the climate- but the impact is exaggerated.

    BOTH sides are cherry picking data and skewing time scales to fit their respective narratives.

    The c02 levels are actually pretty low relative to the earths timescale. It’s actually a pretty complicated topic. It’s like plants need c02, we need plants, but is the sudden exponential increase in c02 too much for us to handle?
    Or is c02 not even the driver of temp. But rather temp decides c02

    And that’s why I’m not sure of anything

  26. Explaining how a car works dosen't means there is no car maker. So, explaining "LIFE ORIGEN " dosen't mean there is no source of origen, a Creator.

  27. Theory of Evolution from Mason Erasmus Darwin: ‘Merchant of Light’ [of Lucifer] of The Lunar Society. Charles Darwin practiced inbreeding (common among ruling class – Nephilim blood), while his cousin Francis Galton popularized Eugenics: "selective breeding" ideals of Plato; original title of C. Darwin’s book included: ”Or the Preservation of Favoured Races in the Struggle for Life”

    Atheism: “senseless” according to Isaac Newton; knowingly or unknowingly following The Unknown God (unknowable [Agnosticism – symbol: ‘Circle-A’, i.e. Asmodeus, anarchy]; Lucifer [ ”personification of atheism”, “spirit of intelligence”, “pure philosophical religion” ]). Early philosophers were Spiritists, Egyptian initiates, elitists, experts in rhetoric. [Philosophy: love of “wisdom” – from Sophia: Goddess of Wisdom (of Gnostics & Sufis [Sophias]) aka Black Goddess, Divine Feminine, Mother of God… The Goddess (of The Wise: wicca, witch, wizard). Sophist (Sophia-ist): “cunning, clever, shrewd, maker of fallacious (false) arguments, scientist” ]. Fields such as theoretical physics prove to be based on Mysticism, where Hindu scriptures and the Kabbalah are the major source of inspiration.

  28. A theory that all creation coming from big bang theory. Hmmmmm. A theory defines something coming from nothing that come together then explode. How scientific is this theory that nothing comes together. How nothing comes together? It’s a b****s***t. Then it produce a one cell bacteria that mutate into a complex life according to Darwin from monkey to human, hmmm so how come that when it mutates then no one cell bacteria anymore? Then due to mutation no monkey anymore? Hmmm. I prefer God created heaven and earth. He said a circle of this earth. How come it is written circle of this earth. When it was written thousand of years ago? When people believe that earth is flat. That’s why they put galelio in jail because he said the earth is round that the priest don’t believe it because it’s an heresy that’s why he was put in indefinite jail until he died.

  29. She taught me nothing new. Global warming has been going on for 4 billion years.. Valcanic ash does more damage then any humans ever could. Such a waste of time and energy.

  30. Something is drastically wrong with your timeline . like 10 years ago scientists found Dinosaur "soft tissue" . DNA intact
    WTF why the foolishness ???

  31. Too many holes, not enough facts. Climate change has happened many time with or without us. I’m sure you would say that we are accelerating this inevitable dooms day but you have no proof. What we do know from those precious rocks of yours is that in the past there have been very fast climate changes at various times throughout history. And before you get any more ideas, we didn’t have anything to do with those.

  32. Too many holes, not enough facts. Climate change has happened many time with or without us. I’m sure you would say that we are accelerating this inevitable dooms day but you have no proof. What we do know from those precious rocks of yours is that in the past there have been very fast climate changes at various times throughout history. And before you get any more ideas, we didn’t have anything to do with those.

  33. She's not very bright. This has been discussed over 100 years ago and she thinks it's a breakthrough event. Hope she gets a refund from her college. She's wasted all our time and her parents money.

  34. "So maybe the reason we aren't connecting with intelligence life elsewhere is that once it evolves, it extinguishes itself quickly".

    Damn that's scary!

  35. I just want one of the smart people explained to me how come we don't get to ever see a person that has evolved from one form into a human form. So all of a sudden since a female and male came into being mother nature knew to stop making people from mud!

  36. I am sorry but you did not come from rocks… You came from dust and to dust you will return. Want to know how life was formed, just be silent and wait. You will stand before your creator.

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