On the origins of land life
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Date: 2024-06-21
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Comments and reviews: 20
aragusea
There are sooooo many fascinating things with origin of life research. For example, there's entire class of chemical reactions called autocatalytic reactions that basically speeds up it's own reaction. It doesn't matter if the initial reaction isn't efficient, as it will speed up exponentially, swamping other reactions. And evolution will took the rest to make it even more efficient. It is thought our metabolism path (Krebs Cycle) is founded from these self-accelerating chemical reactions, creating energy necessary for other reactions.
Others thought life started from RNA with it's ability to catalyze reactions, similiar to protein, while being able to be replicated, like DNA. We can see this from ribosome, which is an enzyme made of RNA (with some peptide for who knows. One research team was able to make RNA strand that replicates other RNA strands.
Still other researchers has more hypotheses, like cell-first, exotic NA backbone, protein-first, etc.
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There are sooooo many fascinating things with origin of life research. For example, there's entire class of chemical reactions called autocatalytic reactions that basically speeds up it's own reaction. It doesn't matter if the initial reaction isn't efficient, as it will speed up exponentially, swamping other reactions. And evolution will took the rest to make it even more efficient. It is thought our metabolism path (Krebs Cycle) is founded from these self-accelerating chemical reactions, creating energy necessary for other reactions.
Others thought life started from RNA with it's ability to catalyze reactions, similiar to protein, while being able to be replicated, like DNA. We can see this from ribosome, which is an enzyme made of RNA (with some peptide for who knows. One research team was able to make RNA strand that replicates other RNA strands.
Still other researchers has more hypotheses, like cell-first, exotic NA backbone, protein-first, etc.
reply
gabry2558
Already saw other biologists write about the endosymbiosis theory for cyanobacteria so i'm gonna write about something else Adam mentioned: lichens, due to their ability to produce organic acids to break up rocks, are considered to be pioneer organisms because they are the first to settle on a surface where there was no life on before. After some time the effects of those acids start to build up making the surface of that rock broken up enough to be able to host small rooting plants which will help further breaking up the rock with their roots. The cycle then goes on multiple times with larger and larger life forms. This is an example of ecological succession
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Already saw other biologists write about the endosymbiosis theory for cyanobacteria so i'm gonna write about something else Adam mentioned: lichens, due to their ability to produce organic acids to break up rocks, are considered to be pioneer organisms because they are the first to settle on a surface where there was no life on before. After some time the effects of those acids start to build up making the surface of that rock broken up enough to be able to host small rooting plants which will help further breaking up the rock with their roots. The cycle then goes on multiple times with larger and larger life forms. This is an example of ecological succession
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morganchilds9054
Couldn't help but think of the great Tom Paxton song I Am Changing My Name to Chrysler
Since the first amphibian crawled out of the slime,
We've been struggling in an unrelenting climb.
We were hardly up and walking before money started talking,
And it said that failure is an awful crime.
It's been that way a millennium or two.
Now it seems there is a different point of view.
If you're a corporate Titanic,
And your failure is gigantic,
Down in Congress there's a safety net for you.
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Couldn't help but think of the great Tom Paxton song I Am Changing My Name to Chrysler
Since the first amphibian crawled out of the slime,
We've been struggling in an unrelenting climb.
We were hardly up and walking before money started talking,
And it said that failure is an awful crime.
It's been that way a millennium or two.
Now it seems there is a different point of view.
If you're a corporate Titanic,
And your failure is gigantic,
Down in Congress there's a safety net for you.
reply
McWilliams93
Life isn’t an accident, I don’t care whether you believe in god or believe it’s a simulation this is not an accident. Science is the process by which we prove through repeatable experiments something is true. The current hypothesis about origin of life on this planet isn’t testable and therefore isn’t scientific. It’s reductionist thinking, That’s it, that’s all you get to claim about these ideas because they do not stem from our own experimentation with repeatable results.
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Life isn’t an accident, I don’t care whether you believe in god or believe it’s a simulation this is not an accident. Science is the process by which we prove through repeatable experiments something is true. The current hypothesis about origin of life on this planet isn’t testable and therefore isn’t scientific. It’s reductionist thinking, That’s it, that’s all you get to claim about these ideas because they do not stem from our own experimentation with repeatable results.
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rebeccaberlin7607
This is fantastic. Unfortunately, you are very wrong about self-sustaining chemical reactions.
One distinct property of self-sustaining systems is that the system can only proceed if molecular triggers (or called seeds) are present initially. Pretty sure science is leaving the theory of spontaneous molecular combustion for spermatogenesis. A molecular trigger never occurs unless it is seeded by an already grossly complex, complete biological system.
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This is fantastic. Unfortunately, you are very wrong about self-sustaining chemical reactions.
One distinct property of self-sustaining systems is that the system can only proceed if molecular triggers (or called seeds) are present initially. Pretty sure science is leaving the theory of spontaneous molecular combustion for spermatogenesis. A molecular trigger never occurs unless it is seeded by an already grossly complex, complete biological system.
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khalid_ba
Plants didn't evolve from cyanobacteria.
Plants evolved from eukaryotic cells, which engulfed a photosynthetic bacteria. The later became the chloroplasts that all plants have.
Eukaryotic cells previously evolved from an archaean cell that engulfed a bacteria which became the mitochondria in all eukaryotes.
Eukaryotes are all complex life today, be they unicellular or multicellular, including animals, plants and fungi.
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Plants didn't evolve from cyanobacteria.
Plants evolved from eukaryotic cells, which engulfed a photosynthetic bacteria. The later became the chloroplasts that all plants have.
Eukaryotic cells previously evolved from an archaean cell that engulfed a bacteria which became the mitochondria in all eukaryotes.
Eukaryotes are all complex life today, be they unicellular or multicellular, including animals, plants and fungi.
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adamsandor7507
I used to live in Knox. I’ve come to wish we could’ve been there and met and met at the same time, just as people. I think my wife would’ve become a god friend of yours for the science aspect, and I could’ve just been a cook friend. I love your videos, fellow Adam. But I also really appreciate your episode about Metallica and your articulation on body awareness
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I used to live in Knox. I’ve come to wish we could’ve been there and met and met at the same time, just as people. I think my wife would’ve become a god friend of yours for the science aspect, and I could’ve just been a cook friend. I love your videos, fellow Adam. But I also really appreciate your episode about Metallica and your articulation on body awareness
reply
davidbeddoe6670
The main thing that has helped me to begin comprehending deep time is to look at it in terms of proportion instead of these huge, seemingly-arbitrary numbers of years. Like how many Anthropocenes can fit in 65 million years, how many Mesozoics can fit in a billion, etc. The universe is always growing novelties at an exponentially increasing rate.
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The main thing that has helped me to begin comprehending deep time is to look at it in terms of proportion instead of these huge, seemingly-arbitrary numbers of years. Like how many Anthropocenes can fit in 65 million years, how many Mesozoics can fit in a billion, etc. The universe is always growing novelties at an exponentially increasing rate.
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commonsense660
Actually just open water is a terrible environment for life to form. At that point you are literally just hoping for billions of things to align the right way purely by chance. Cells/protocells need a barrier to keep itself intact and fight entropy. Somewhere with wet/dry cycles or wet pockets near or on hydrothermal vents is much more plausible
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Actually just open water is a terrible environment for life to form. At that point you are literally just hoping for billions of things to align the right way purely by chance. Cells/protocells need a barrier to keep itself intact and fight entropy. Somewhere with wet/dry cycles or wet pockets near or on hydrothermal vents is much more plausible
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grimterrapin3987
Question: did ocean life transition to fresh water lakes and rivers before it moved to land, or did life just crawl straight from the ocean to land Like how are there fresh water fish How'd they get to those rivers from the ocean Or land vertebrates are derived from amphibians so were those ancient amphibians a new kind of salt water amphibian
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Question: did ocean life transition to fresh water lakes and rivers before it moved to land, or did life just crawl straight from the ocean to land Like how are there fresh water fish How'd they get to those rivers from the ocean Or land vertebrates are derived from amphibians so were those ancient amphibians a new kind of salt water amphibian
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zarblitz
Seeing those fish wriggle up out of the water to get some food definitely make you appreciate how those lobe-finned fish a few hundred million years ago could have gained a competitive advantage by being able to travel further and further out of the water to access food other fish couldn't - leading us to the first tetrapods.
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Seeing those fish wriggle up out of the water to get some food definitely make you appreciate how those lobe-finned fish a few hundred million years ago could have gained a competitive advantage by being able to travel further and further out of the water to access food other fish couldn't - leading us to the first tetrapods.
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iivin4233
I never quite understand people who know life is just a chemical reaction and are fine with it. I know it, too. I'm just depressed by it. Something help them if they're excited by it. To clarify, life is awesome to look at. The universe is. It looks and sometimes feels for all the worlds that there is something more to it.
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I never quite understand people who know life is just a chemical reaction and are fine with it. I know it, too. I'm just depressed by it. Something help them if they're excited by it. To clarify, life is awesome to look at. The universe is. It looks and sometimes feels for all the worlds that there is something more to it.
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1stGruhn
Man, when I took soils in college, it was drilled into me that organic matter WASNT soil. Soil was sand, silt, and clay and was inorganic mineral of various size with sand being the largest and clay being the smallest. but I see now that humus is now considered soil organic matter, ie, part of soil. How things change.
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Man, when I took soils in college, it was drilled into me that organic matter WASNT soil. Soil was sand, silt, and clay and was inorganic mineral of various size with sand being the largest and clay being the smallest. but I see now that humus is now considered soil organic matter, ie, part of soil. How things change.
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shaggnar2014
Fun fact about that burrow animals bit. Earth worms are not actually native to North America and we're only introduced in the 1800's.
Before then there were actually larger masses of leaves that took longer to decompose and that is part of chestnut trees are struggling to come back after the blight
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Fun fact about that burrow animals bit. Earth worms are not actually native to North America and we're only introduced in the 1800's.
Before then there were actually larger masses of leaves that took longer to decompose and that is part of chestnut trees are struggling to come back after the blight
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Aurochs330
You know, nothing’s to say that life isn’t constantly being spontaneously created but as soon as a new lifeform appears it just as quickly dies off since it has to compete with all the prexisting life that has had BILLIONS of years to evolve and compete. It’s quite a fascinating thought!
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You know, nothing’s to say that life isn’t constantly being spontaneously created but as soon as a new lifeform appears it just as quickly dies off since it has to compete with all the prexisting life that has had BILLIONS of years to evolve and compete. It’s quite a fascinating thought!
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falcolf
I got cyanobacteria in my marine aquarium and it was mostly red! Super fascinating stuff which I rarely see now since my tiny reef got bigger then evolved into supporting coral; now I regularly harvest hair algae lol. After a good rinse to get the salt off it makes a good plant fertalizer!
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I got cyanobacteria in my marine aquarium and it was mostly red! Super fascinating stuff which I rarely see now since my tiny reef got bigger then evolved into supporting coral; now I regularly harvest hair algae lol. After a good rinse to get the salt off it makes a good plant fertalizer!
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hayashi_6455
I know it's just an ad read but you really don't need some fancy heat conducter to make quick iced coffee. Just brew filter coffee over ice with less than usual brewing water and it does exactly the same thing. Look up flash brew recipes for your brew method, it's really quite easy.
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I know it's just an ad read but you really don't need some fancy heat conducter to make quick iced coffee. Just brew filter coffee over ice with less than usual brewing water and it does exactly the same thing. Look up flash brew recipes for your brew method, it's really quite easy.
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EricVulgaris
Great description of life. Shore creeping could be a part of the equation, but The Earth Transformed by Peter Frankopan posited that terrestial life might have gotten a start due to lunar tides locking sea creatures into lakes. Billions of years ago lunar tides woulda been enormous.
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Great description of life. Shore creeping could be a part of the equation, but The Earth Transformed by Peter Frankopan posited that terrestial life might have gotten a start due to lunar tides locking sea creatures into lakes. Billions of years ago lunar tides woulda been enormous.
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teraxiel
If you want freshly brewed coffee but you want it iced, just make more coffee than you need every morning and freeze some of it in ice cube trays and use those to ice your hot coffee. I've done this for years now. It's way better than ice cubes because it doesn't water down your coffee.
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If you want freshly brewed coffee but you want it iced, just make more coffee than you need every morning and freeze some of it in ice cube trays and use those to ice your hot coffee. I've done this for years now. It's way better than ice cubes because it doesn't water down your coffee.
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ashurean
Everyone sleeps on dirt as a concept, like we just have this layer of nutrient-rich mass coating most of our landmasses that is the end result of billions of years of microbial and plant life breaking down minerals, synthesizing new molecules, and then dying.
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Everyone sleeps on dirt as a concept, like we just have this layer of nutrient-rich mass coating most of our landmasses that is the end result of billions of years of microbial and plant life breaking down minerals, synthesizing new molecules, and then dying.
reply
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