This video is so meditative. There's nothing more calming to me than snorkeling on a sunny day in some warm water. The track and narration are just so peaceful.
Just read about these in the great book "A short history of nearly everything", and a second later I can see them on you tube. Science comes so close! I love this era.
Lauren Welsch gol 106 fall 2019_ i learned alot today about stromatolites and i found out that they were the first form of life on earth found in shallow water.
@CrawlingCoconut we didnt directly evolve from these, but because these produced oxygen and were around for so long, are attributed to providing oxygen for which other life forms which we evolved from were able to survive
@lorez201 But where did all of the species that comprised that community come from? Did all of its members just pop into existence at the same time? if so, how did organisms that arose independently and have radically disparate gentics manage to breed and produce the species we see today, whose fundamental chemistries are virtually identical? If life did arise multiple times, our biosphere must be based upon only one of those events, so we still had a common ancestor.
@lorez201 However, there may be other ancestors unrelated to ours. So there could have been multiple genetically distinct organisms that arose independently, but all of the life we see today would only be based on one of them. If there's still life from another ancestor, we haven't seen it yet.
@CrawlingCoconut well there were some single cell bacteria and colonies of blue green algae, but the stramatolites it seems, were the main thing, and they are usually considered to be around since like 3.5 to 3 billion years ago, but then 1,25 billion years ago there numbers dropped, which could indicate multi celled animals grazing on them, which led to their decrease in numbers, but considering the earth is only 4.567 billion years old, it gives you an idea of ancient stramatolites are
@magick205 I don't believe in LUCA. It's impossible (or at least verrrryyyy unlikely) that all of the billions and billions of species on the planet originated from one single organism. Rather, it was much more likely that a community of genetically unique organisms thrived in symbiosis, competition, and predation with one another. On top of that, the organisms likely exchanged sections of their genomes with one another. That community was the Ultimate Ancestor.
Without the oxygen produced by the cyanobacteria, we could not have evolved. If serial endosymbiotic events had not resulted in "internalized" cyanobacteria in plants, we could not survive. Similarly, mitochondria in plants and animals derive from bacteria (prob. proteobacteria, iirc). Our most distant ancestors *were* bacteria. His friend was wrong about stromatolites per se.
Unicellular life does include eukaryotes, but most people know very, very little about prokaryotes. (I'm in the very little category.) Heck, most people do not know the difference between a virus and a bacterium. It's ironic when one considers that prokaryotes were all that lived for over 2 billion years. Bacteriology is just not sexy, I guess ;)
I was sure that you'd know the relationship, though sometimes people say single-celled when they mean prokaryotic. I volunteer for the Lest We Forget Amoeba Society ;^)
This video is so meditative. There's nothing more calming to me than snorkeling on a sunny day in some warm water. The track and narration are just so peaceful.
my right ear loved this classic video
Thumbs up if you are in EOSC 326
👍
👍from 2024
Just read about these in the great book "A short history of nearly everything", and a second later I can see them on you tube. Science comes so close! I love this era.
Can you snorkel among stromatolites on your own or is it possible only with a tour?
Lauren Welsch gol 106 fall 2019_ i learned alot today about stromatolites and i found out that they were the first form of life on earth found in shallow water.
@CrawlingCoconut we didnt directly evolve from these, but because these produced oxygen and were around for so long, are attributed to providing oxygen for which other life forms which we evolved from were able to survive
@lorez201 But where did all of the species that comprised that community come from? Did all of its members just pop into existence at the same time? if so, how did organisms that arose independently and have radically disparate gentics manage to breed and produce the species we see today, whose fundamental chemistries are virtually identical? If life did arise multiple times, our biosphere must be based upon only one of those events, so we still had a common ancestor.
@lorez201 However, there may be other ancestors unrelated to ours. So there could have been multiple genetically distinct organisms that arose independently, but all of the life we see today would only be based on one of them. If there's still life from another ancestor, we haven't seen it yet.
@CrawlingCoconut well there were some single cell bacteria and colonies of blue green algae, but the stramatolites it seems, were the main thing, and they are usually considered to be around since like 3.5 to 3 billion years ago, but then 1,25 billion years ago there numbers dropped, which could indicate multi celled animals grazing on them, which led to their decrease in numbers, but considering the earth is only 4.567 billion years old, it gives you an idea of ancient stramatolites are
@magick205 I don't believe in LUCA. It's impossible (or at least verrrryyyy unlikely) that all of the billions and billions of species on the planet originated from one single organism. Rather, it was much more likely that a community of genetically unique organisms thrived in symbiosis, competition, and predation with one another. On top of that, the organisms likely exchanged sections of their genomes with one another. That community was the Ultimate Ancestor.
Without the oxygen produced by the cyanobacteria, we could not have evolved.
If serial endosymbiotic events had not resulted in "internalized" cyanobacteria in plants, we could not survive. Similarly, mitochondria in plants and animals derive from bacteria (prob. proteobacteria, iirc).
Our most distant ancestors *were* bacteria. His friend was wrong about stromatolites per se.
Occam's Razor: Apply it
Unicellular life does include eukaryotes, but most people know very, very little about prokaryotes. (I'm in the very little category.) Heck, most people do not know the difference between a virus and a bacterium.
It's ironic when one considers that prokaryotes were all that lived for over 2 billion years. Bacteriology is just not sexy, I guess ;)
LOL. Even if he does, it would be messy to use a keyboard with such sticky fingers ;^/
I was sure that you'd know the relationship, though sometimes people say single-celled when they mean prokaryotic. I volunteer for the Lest We Forget Amoeba Society ;^)
Interesting video, we also do have Stromatolites in BC's fresh waters like; Pavillion and Kelly Lakes. Check out the video I uploaded recently.
The true Adam and Eve ....
WOW!!!=0
I did the same