UM-Bot Posted April 5, 2018 #1 Share Posted April 5, 2018 A lack of phosphorus in the universe could mean that Earth-type life is a lot rarer than commonly thought. https://www.unexplained-mysteries.com/news/316985/discovery-suggests-that-alien-life-may-be-rare 1 Link to comment Share on other sites More sharing options...
Grignr Posted April 5, 2018 #2 Share Posted April 5, 2018 I'm a big fan of Stephen Baxter's Manifold trilogy, a set of Sci Fi books in alternate timelines (repeating characters, very different stories) covering a variety of potential reasons for the Fermi paradox, each book explores a different reason why we may not have seen evidence of alien civilisations until this point in time. https://en.wikipedia.org/wiki/Manifold_Trilogy Link to comment Share on other sites More sharing options...
Orphalesion Posted April 5, 2018 #3 Share Posted April 5, 2018 11 minutes ago, seanjo said: Even if rare, (intelligent) life is still going to be present in the thousands in any given Milky way like Galaxy... Exactly. if we are talking rare talking rare on a galactic scale that would still potentially add up to an astronomical number. 3 Link to comment Share on other sites More sharing options...
+Not A Rockstar Posted April 5, 2018 #4 Share Posted April 5, 2018 Like lotto numbers, despite the odds, people win every few weeks. I believe there is life out there. 4 Link to comment Share on other sites More sharing options...
Piney Posted April 5, 2018 #5 Share Posted April 5, 2018 2 hours ago, Grignr said: I'm a big fan of Stephen Baxter's Manifold trilogy, a set of Sci Fi books in alternate timelines (repeating characters, very different stories) covering a variety of potential reasons for the Fermi paradox, each book explores a different reason why we may not have seen evidence of alien civilisations until this point in time. https://en.wikipedia.org/wiki/Manifold_Trilogy In the original Dune series by Frank Herbert and the Foundation series by Isaac Asimov humans never make contact with technological life. Just different plant and animal life. Link to comment Share on other sites More sharing options...
Grignr Posted April 5, 2018 #6 Share Posted April 5, 2018 7 minutes ago, Piney said: In the original Dune series by Frank Herbert and the Foundation series by Isaac Asimov humans never make contact with technological life. Just different plant and animal life. I think the concepts covered in the series I mention (he did some short stories too) are: Galactic level catastrophes occur often enough that other species are not much more advanced than our own anywhere in our own Galaxy, some species of Aliens have progressed a little more quickly and the expected expansion of those species becomes detectable in the very near future. Life is so rare that we really are the only planet to form intelligent life. Each intelligent species evolves in its own universe in the Multiverse and so never meet. The universe is a simulation entirely created to study evolution of life on our planet, the expansion of our probes outside of the solar system causes the simulation to go out of its memory buffer and start breaking down. 2 Link to comment Share on other sites More sharing options...
bison Posted April 5, 2018 #7 Share Posted April 5, 2018 Does a star going supernova have to be as massive as that at Cassiopeia , in order disperse enough phosphorus to support life in nearby forming star systems.? This isn't really clear, but if so, bear in mind that there are 20,000 such stars in our galaxy. Lots and lots of opportunities for the fostering of life. They only looked at two supernova remnants in this study. Cassiopeia A, and the substantially less massive Taurus A (Crab nebula). The latter occurred about 900 years ago, as opposed to ~ 300 years for the former. It seems reasonable that In the older explosion, the elements, including phosphorus, should be more dispersed, hence less plentiful in a given area of space. Link to comment Share on other sites More sharing options...
Waspie_Dwarf Posted April 5, 2018 #8 Share Posted April 5, 2018 1 hour ago, bison said: bear in mind that there are 20,000 such stars in our galaxy. Lots and lots of opportunities for the fostering of life. In a galaxy of several hundred BILLION stars there is no conceivable way that 20,000 could be considered "lots and lots". Link to comment Share on other sites More sharing options...
Ozfactor Posted April 6, 2018 #9 Share Posted April 6, 2018 They don't have to land on our doorsteps , just a sign, a message to let us know we are not alone . For all we know they are sending messages but we just don't have the technology to realise it . Yet For all we know Link to comment Share on other sites More sharing options...
Harte Posted April 10, 2018 #10 Share Posted April 10, 2018 On 4/5/2018 at 10:40 AM, Piney said: In the original Dune series by Frank Herbert and the Foundation series by Isaac Asimov humans never make contact with technological life. Just different plant and animal life. IIRC, the reason for this in the Foundation series was that time travelling robots went back and prevented alien intelligence because it led to troubles for humanity, which the robots had no choice but to protect. Harte 1 Link to comment Share on other sites More sharing options...
Piney Posted April 10, 2018 #11 Share Posted April 10, 2018 1 minute ago, Harte said: IIRC, the reason for this in the Foundation series was that time travelling robots went back and prevented alien intelligence because it led to troubles for humanity, which the robots had no choice but to protect. Harte That was "Robots and Dawn" if I remember correctly. Link to comment Share on other sites More sharing options...
Harte Posted April 10, 2018 #12 Share Posted April 10, 2018 What nerds we be. Harte Link to comment Share on other sites More sharing options...
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