Posts by Samuel
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Message boards :
Number crunching :
TIME FOR A NEW FUND DRIVE.
(Message 1706645)
Posted 30 Jul 2015 by  Samuel
Post: Just made my first donation Total amount $10.00 Last donation received 28 Jul 2015, 7:00:00 UTC :-) |
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Message boards :
SETI@home Science :
Let's see some results!
(Message 1494532)
Posted 24 Mar 2014 by Samuel
Post: I don't think that single biomarkers can be signs of life. The important thing is the chemical equilibrium of the whole atmosphere. If it's far away from equilibrium and you can't explain why it is so, then probably it's produced by life. maybe you are interrested in a quote i found in a book: The idea is that gas byproducts from metabolic redox reactions can accumulate in the atmosphere and would be recognized as biosignauters because abiotic processes are unlikly to create a redox disequilibrium. indeed earth's atmosphere has oxygen (a highly oxidized species) and methane (a highly reduced spcies) several orders of magnitude out of the thermochmical redox equilibrium. In practice it could be difficult to detect redox disequilibrium molecular featurs. The earth as an exoplanet, for example, has a relatively prominet oxygen absorption feature at 0,76um, whereas methane at presentday levels of 1,6 ppm has only extremly weak spectral features. During early earth CH4 may have been present at much higher levels (1000 ppm or even 1%), as possibly produced by widespread methanogen bacteria (Haqq-Misara et. al 2008). Such high CH4 concentrations would be easier to detect, but since the earth was not oxygenatd during erly times the O2-CH4 redox dissequilibrium would not be detectable concurrently (des marias et al. 2002) |
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Message boards :
SETI@home Science :
Kepler Telescope
(Message 1480542)
Posted 22 Feb 2014 by Samuel
Post: +100 i am pretty sure if we would be at 2,000 light years from here and try to find an exoplanet here , we wouldnt find nor the earth, but also wouldnt find Jupiter nor Saturn. |
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Message boards :
SETI@home Science :
New Science Channel programming most likely disappointing
(Message 1479520)
Posted 20 Feb 2014 by Samuel
Post: i also think so. UFOs aren't a scientific topic. there are Maybe just some unknown meteorological phenomenons waiting to be discovered... sadly this topic is beeing handled very unserious and childish. |
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Message boards :
SETI@home Science :
Are we intelligent enought to even acknowledge an ET call?
(Message 1478248)
Posted 17 Feb 2014 by Samuel
Post: citation for this supposed biologist who claims all of that as well, especially the five fingers part I can't give you now a excat citation, but Simon Conway Morris worte a book about convergent evolution. Life's Solution. Inevitable Humans in a Lonely Universe. Run that by me again in English? is my english so bad? :-D |
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Message boards :
SETI@home Science :
Are we intelligent enought to even acknowledge an ET call?
(Message 1477912)
Posted 16 Feb 2014 by Samuel
Post: But if we trust some biologists, an intelligent extra-terrestrial species would be a bilaterally symmetrical organism, with a bipedal locomotion, 5 fingers, cephalization and using the same senses as we do…etc... In fact they would be very similar to homo sp. They justify this idea with the biological principle of convergent evolution. :-) |
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Message boards :
SETI@home Science :
Are we intelligent enought to even acknowledge an ET call?
(Message 1477516)
Posted 15 Feb 2014 by Samuel
Post: Sure, mathematic seems to be universal, and so this aspect would be no problem for us. But what about the linguistic barriers between ET and humans? And maybe they use different ways of thinking... Imagine a eusocial species communicating via chemical compounds (like ants), such a species would be aware of the world they are living in in a way we can’t hardly imagine. |
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Message boards :
SETI@home Science :
Are we intelligent enought to even acknowledge an ET call?
(Message 1476988)
Posted 14 Feb 2014 by Samuel
Post: An ET- society which is trying to communicate (radio signals) with other hypothetical civilisations reminds me of our own society. In a very anthropocentric point of view they would be very similar to homo sapiens. Similar technology.. discovery spirit… And the transmitted signal would be easy to detect for us, but I think it would be maybe impossible for us to decode any information out of such signal. |
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Message boards :
Politics :
PitifulPeacePrizin' POtus aka PrisonerExchanging You Can Believe In, 'is' Tee'd Up & Ready tO Act. HOle in One fO da Vrold.
(Message 1465363)
Posted 17 Jan 2014 by Samuel
Post: wtf? |
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Message boards :
SETI@home Science :
Origin of life?
(Message 1385365)
Posted 28 Jun 2013 by Samuel
Post: The one and absolutely the only place life could come from is space. I'm not a campaigner for the panspermia hypothesis. you can compare the early earh with a chemical laboratory. Everything life is made of you can find here. Asteroids maybe brought some building blocks (and also nearly the whole H2O) for the first autoreplicating polymeric moleculs (maybe RNA, PNA (peptide nucleic acid), prebiotic proteins eg..). :-) |
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Message boards :
SETI@home Science :
Planet Hunters Report Record-Breaking Discovery, Search for other habitable planets
(Message 1385353)
Posted 28 Jun 2013 by Samuel
Post: i agree that there are billions of earth- like planets in the universe. But the philosophers' stone will be to find a planet whose physical parameters are nearly exactly the same as we know them form earth. For example: mass, rotation-period, the solar spectrum and the age of the star where the planet is orbiting, a moon (big moon), a jupiter like planet in the outer solarsystem, percentage of heavy metals (heavier than He), climate of the planet, axis dispositon, plate tectonic, spiral galaxy, habitable zone of this galaxy.... and so on.. all this parameters reduce the our opportunities to find such an planet. the next big question is: is life omnipresent? |
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Message boards :
SETI@home Science :
Biological SETI - We're looking the wrong way
(Message 1357705)
Posted 17 Apr 2013 by Samuel
Post: What about mutation rates? They are pretty high in unused parts of den DNA. And so I think It would be nearly impossible do decode the orignale message |
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Message boards :
SETI@home Science :
So many planets and no way to get there. What a bummer!
(Message 1333911)
Posted 2 Feb 2013 by Samuel
Post: It doesnt matter ,if you run marathon in space and reap little on bone loss. squids would be nice astronauts.. :-) |
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Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1329494)
Posted 20 Jan 2013 by Samuel
Post: the nanoparticles found in ALH are simply to small. length: 380nm wide range about 20nm.(Scientific american) ( 20-100 nanometres in diameter, wiki) the diameter of a ribosome is about 20-25nm. in an E.Coli you can find about 20 000 ribosomes. the smallest living beeing (Mycoplasma) has a diamter about 200nm. Staphylococcous aureus: 600nm.... the ALH84001 particles are to small to produce Proteins, no space for a metabolism etc. The famous nanobacteria (for example Nanobacterium sanguineum)seems to be only anamorphic hydroxylapatite crystals (Ca2+ + PO42-) with proteins, lipids, DNA, RNA.. (sientific american) you may like: http://journalofcosmology.com/Panspermia1.html |
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Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1329402)
Posted 20 Jan 2013 by Samuel
Post: Remember ALH 84001... Nanobacteria from mars, a great failure Today, rock 84001 speaks to us across all those billions of years and millions of miles. It speaks of the possibility of life. |
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Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1328544)
Posted 18 Jan 2013 by Samuel
Post: Bilateral symmetry seems to be one of those features that occur again and again in very many, and very different forms of life. Yes nearly every high developed has a bilateral Symmetry - the Bilateria. I just wanted to say that there are two crown-groups of Diatomeens- the Order Centrales engl. Centric(radial) and the Order Pennales engl. Pennate (bilateral)(old system). .... examined before we can say with certainty whether this is an Earthly organism, or one that merely has some points of resemblance to same. this discovery need to be checked, true. But you have to be very careful and critical about this topic. It states that among competing hypotheses, the one that makes the fewest assumptions should be selected. Occam's razor |
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Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1328340)
Posted 17 Jan 2013 by Samuel
Post: yes convergent evolution is common in nature. Same solutions for the same problems. but its nearly impossible that life on other planets "choose" the same way of evolution. Diatomeen are well studied. their ecology etc and also their evolution, because they store silic acid (SiO2 · n H2O) in their cell wall. And so you can find them often well preserved. I know not much about them but when you take a look a the picture you can specify the Order. I looks like O. Pennales because of their bilateral symmetry. O. Pennales (Eunotiales, Diatomales, Achnanthes or Naviculales), its hard to specify exactly, because you only see one side of this organism. Does anybody know better? some botany experts? :-) |
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Message boards :
SETI@home Science :
Fossils in a newly fallen meteorite?
(Message 1328287)
Posted 17 Jan 2013 by Samuel
Post: These diatoms have definitely an terrestrial origin. Diatoms appeared hundred billions of years after the "genesis". The oxygenic photosynthesis they use have been invented by Cyanobacteria. Diatomeen also have an secondary endosymbiosis (with am eucaryotic algae). They also an N2-fixing endosymbiosis (with Cyanobacteria). This is the result of a long long evolution on earth. ------------- I think panspermia is a nice idea. But i think that the originate of life happened on earth. meteorites may be important for accumulation organic matter. |
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Message boards :
SETI@home Science :
Astropulse result
(Message 1317030)
Posted 19 Dec 2012 by Samuel
Post: Hello, sorry i don't know where to post my question. and so i decided to make a new thread :-) Sorry about that. What does that mean? ap_12no12aa_B4_P1_00052_20121218_25767.wu_0 RFI? or simply a compute error? Found 30 single pulses and 30 repeating pulses, exiting. percent blanked: 0.00 http://setiathome.berkeley.edu/result.php?resultid=2758438248 |
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Message boards :
SETI@home Science :
HD 40307g
(Message 1303509)
Posted 8 Nov 2012 by Samuel
Post: new discovery: HD 40307g http://phl.upr.edu/press-releases/firstpotentialhabitableexoplanetinasix-planetstarsystem http://phl.upr.edu/projects/habitable-exoplanets-catalog |
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