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| Radially symmetric life; Radially symmetric land life | |
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| Topic Started: Jun 27 2009, 02:33 PM (2,097 Views) | |
| T.Neo | Jun 27 2009, 02:33 PM Post #1 |
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Translunar injection: TLI
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If axisymmetric life was dominant on land, what would it look like? Where would it have eyes, mouths and excretory organs? Would it/could it ever evolve flying forms? Just a thought. I'm beginning to think I wonder about this stuff too much.
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| A hard mathematical figure provides a sort of enlightenment to one's understanding of an idea that is never matched by mere guesswork. | |
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| lamna | Jun 27 2009, 02:53 PM Post #2 |
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What does you mean? I have never heard of that |
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Living Fossils Fósseis Vibos: Reserva Natural 34 MYH, 4 tonne dinosaur. [flash=500,450] Video Magic! [/flash] | |
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| T.Neo | Jun 27 2009, 03:19 PM Post #3 |
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Translunar injection: TLI
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Oh, my apologies, I meant radial symmetry, like echinoderms and cnidarians. |
| A hard mathematical figure provides a sort of enlightenment to one's understanding of an idea that is never matched by mere guesswork. | |
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| Giant Blue Anteater | Jun 27 2009, 03:39 PM Post #4 |
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Prime Specimen
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If radially symmetric life were to go to land, their senses would likely be in the center of the body where the brain may most likely be, unless their skin is essentially a compound eye, as seen in a species of starfish. But if they were to be larger, more dominant creatures, then they would likely converge to a bilaterally symetrical bodyplan. I don't think radially symmetrical creatures can become flyers unless they converge to bilateral symmetry. |
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| Empyreon | Jun 27 2009, 04:44 PM Post #5 |
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Are you plausible?
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Radially symmetrical macrofauna would have their senses at the top/center of their bodies, or perhaps on some sort of equatorial arrangement (unless they're REALLY big!). They would likely have 360 degree vision, and maybe even extend their centrally located sensors. Sounds like some of the things I've got cooking up for my project...
My cloudrockets are radially symmetrical... |
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Take a look at my exobiology subforum of the planet Nereus! COM Contributions food for thought
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| CarrionTrooper | Jun 27 2009, 11:48 PM Post #6 |
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I require more vespene gas?!?
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Hmmm yeah, chemical 'rockets' could be radial. A more far-fetched idea is having a copter-like flyer. The rotor arrangement would be intricate and hard to evolve. |
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| ATEK Azul | Jun 27 2009, 11:59 PM Post #7 |
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Transhuman
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I think that a fusion of rockets and blade like limbs/extensions could develope in a radialy symetrical organism, with the rockets providing spin and minor propulsion which would mostly be generated by the spin of the limbs/extensions? |
| I am dyslexic, please ignore the typo's! | |
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| Empyreon | Jun 28 2009, 03:46 PM Post #8 |
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Are you plausible?
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Y'know, speaking of radially symmetrical flight, Gert Van Dijk has been playing around with this idea and has posted some of his thoughts on his blog. Go check it out! |
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Take a look at my exobiology subforum of the planet Nereus! COM Contributions food for thought
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| ATEK Azul | Jun 28 2009, 06:35 PM Post #9 |
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Transhuman
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That person has some nice pictures of his ideas though I did not read any of it. I thought i saw the blog spot logo on his blog do you have a direct link to his part of the blogspot site instead of that possibly boobytraped personal site? Also how would larger life live if it was radialy symetrical and on land? could some form of vertebrae evolve in these life forms? |
| I am dyslexic, please ignore the typo's! | |
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| Ànraich | Jun 28 2009, 08:30 PM Post #10 |
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L'évolution Spéculative est moi
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I've always imagined radially symmetrical organisms to evolve from starfish like creatures. Their limbs would evolve into legs and they would probably move somewhat like a spider (slowly, carefully, but capable of sudden bursts of speed). If they didn't have a compound eye I imagine they would develop eye stalks, radially spaced. That would allow not only for complete vision around the organism but triangulation for depth between any two eyes as well. Flight probably wouldn't develop unless it had some kind of bladder filled with lighter than air gas. And even then it would either have to be some kind of filter feeding balloon or live in an atmosphere thick enough that it's limbs could become webbed and it could move like some kind of sky jellyfish. |
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We should all aspire to die surrounded by our dearest friends. Just like Julius Caesar. "The Lord Universe said: 'The same fate I have given to all things from stones to stars, that one day they shall become naught but memories aloft upon the winds of time. From dust all was born, and to dust all shall return.' He then looked upon His greatest creation, life, and pitied them, for unlike stars and stones they would soon learn of this fate and despair in the futility of their own existence. And so the Lord Universe decided to give life two gifts to save them from this despair. The first of these gifts was the soul, that life might more readily accept their fate, and the second was fear, that they might in time learn to avoid it altogether." - Excerpt from a Chanagwan creation myth, Legends and Folklore of the Planet Ghar, collected and published by Yieju Bai'an, explorer from the Celestial Commonwealth of Qonming Tree That Owns Itself
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| Empyreon | Jun 29 2009, 11:39 AM Post #11 |
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Are you plausible?
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Sorry about that. I didn't realize it had been in a frame. http://planetfuraha.blogspot.com/
I'll get to work on my Magnificent Striders and some of my other ideas for radially symmetrical land life. Keep an eye on the Nereus thread. Also (and this ties in with the starfish reference) I've got an article on my personal website of a giant starfish. It's not intended to have any scientific accuracy, but it's an idea of what one might look like. |
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Take a look at my exobiology subforum of the planet Nereus! COM Contributions food for thought
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| ATEK Azul | Jun 29 2009, 03:58 PM Post #12 |
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Transhuman
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That starfish is interesting and although it needs an internal skeleton(which it might already have) I find it descent in design. |
| I am dyslexic, please ignore the typo's! | |
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| Ànraich | Jun 29 2009, 04:09 PM Post #13 |
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L'évolution Spéculative est moi
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Not necessarily. It might evolve an exoskeleton. But I have a more interesting idea for radially symmetrical life. I've always had ideas for them in my head, maybe this topic requires me to draw and share them, but in a later post. My idea is that they would evolve two separate circulatory systems; one open and one closed. The closed system would provide blood to the brain and organs while the open one would provide blood to the tissues and skin. In this way the blood-filled sinuses character of an open circulatory system could be used as a support. Maybe they could even somehow become pressurized for added support. Or, in another take on the idea, it evolves the closed system but the sinuses from the open system remain vestigial and eventually evolve to take in air rather than blood, so they're supported by several lungs. |
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We should all aspire to die surrounded by our dearest friends. Just like Julius Caesar. "The Lord Universe said: 'The same fate I have given to all things from stones to stars, that one day they shall become naught but memories aloft upon the winds of time. From dust all was born, and to dust all shall return.' He then looked upon His greatest creation, life, and pitied them, for unlike stars and stones they would soon learn of this fate and despair in the futility of their own existence. And so the Lord Universe decided to give life two gifts to save them from this despair. The first of these gifts was the soul, that life might more readily accept their fate, and the second was fear, that they might in time learn to avoid it altogether." - Excerpt from a Chanagwan creation myth, Legends and Folklore of the Planet Ghar, collected and published by Yieju Bai'an, explorer from the Celestial Commonwealth of Qonming Tree That Owns Itself
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| ATEK Azul | Jun 29 2009, 04:15 PM Post #14 |
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Transhuman
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Although I do not know much about those 2 systems it sounds like a good idea with alot of possibilities please share those ideas they sound fascinating! |
| I am dyslexic, please ignore the typo's! | |
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| Ànraich | Jun 29 2009, 04:21 PM Post #15 |
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L'évolution Spéculative est moi
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I probably should have explained what they are in the first place. An open circulatory system is common amongst more primitive creatures, particularly mollusks. They don't have arteries or blood vessels, instead they have a simple heart that pumps blood into sinuses. The sinuses become filled with blood, which not only provides the cells with nutrients but also supports the invertebrate's body (as they lack muscles). This is why octopi and squids are so flexible. A closed circulatory system is like ours; it has a complex heart that pumps blood through arteries, veins, and blood vessels. Because we aren't supported by the sinuses (as they are absent) we needed muscles and a skeleton to support us. So I'm thinking if you kept the open circulatory system as well as developed a closed one you could have a body that could be supported on land but that would also be efficient for full terrestrial life. |
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We should all aspire to die surrounded by our dearest friends. Just like Julius Caesar. "The Lord Universe said: 'The same fate I have given to all things from stones to stars, that one day they shall become naught but memories aloft upon the winds of time. From dust all was born, and to dust all shall return.' He then looked upon His greatest creation, life, and pitied them, for unlike stars and stones they would soon learn of this fate and despair in the futility of their own existence. And so the Lord Universe decided to give life two gifts to save them from this despair. The first of these gifts was the soul, that life might more readily accept their fate, and the second was fear, that they might in time learn to avoid it altogether." - Excerpt from a Chanagwan creation myth, Legends and Folklore of the Planet Ghar, collected and published by Yieju Bai'an, explorer from the Celestial Commonwealth of Qonming Tree That Owns Itself
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