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Darwin's aliens

  • Samuel R. Levin (a1), Thomas W. Scott (a1), Helen S. Cooper (a2) and Stuart A. West (a1)
Abstract
Abstract

Making predictions about aliens is not an easy task. Most previous work has focused on extrapolating from empirical observations and mechanistic understanding of physics, chemistry and biology. Another approach is to utilize theory to make predictions that are not tied to details of Earth. Here we show how evolutionary theory can be used to make predictions about aliens. We argue that aliens will undergo natural selection – something that should not be taken for granted but that rests on firm theoretical grounds. Given aliens undergo natural selection we can say something about their evolution. In particular, we can say something about how complexity will arise in space. Complexity has increased on the Earth as a result of a handful of events, known as the major transitions in individuality. Major transitions occur when groups of individuals come together to form a new higher level of the individual, such as when single-celled organisms evolved into multicellular organisms. Both theory and empirical data suggest that extreme conditions are required for major transitions to occur. We suggest that major transitions are likely to be the route to complexity on other planets, and that we should expect them to have been favoured by similarly restrictive conditions. Thus, we can make specific predictions about the biological makeup of complex aliens.

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Copyright
Corresponding author
Author for correspondence: Samuel R. Levin, E-mail: samuel.levin@zoo.ox.ac.uk
References
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Archibald JM (2015). Endosymbiosis and Eukaryotic Cell Evolution. Current biology: CB 25(19), R911921.
Benner SA (2003). Synthetic biology: Act natural. Nature 421(6919), 118.
Boomsma JJ (2007). Kin selection versus sexual selection: why the ends do not meet. Current biology : CB 17(16), R673R683.
Boomsma JJ (2009). Lifetime monogamy and the evolution of eusociality. Philosophical transactions of the Royal Society of London. Series B, Biological sciences 364(1533), 31913207.
Boomsma JJ (2013). Nature's True Self. Science (New York, N.Y.) 340(6129), 145146.
Bourke AFG (2011). Principles of Social Evolution. Oxford University Press.
Buss LW (1987) The Evolution of Individuality. Princeton University Press.
Cassan A, Kubas D, Beaulieu J-P, Dominik M, Horne K, Greenhill J, Wambsganss J, Menzies J, Williams A, Jørgensen UG, Udalski A, Bennett DP, Albrow MD, Batista V, Brillant S, Caldwell JAR, Cole A, Coutures C, Cook KH, Dieters S, Prester DD, Donatowicz J, Fouqué P, Hill K, Kains N, Kane S, Marquette J-B, Martin R, Pollard KR, Sahu KC, Vinter C, Warren D, Watson B, Zub M, Sumi T, Szymanski MK, Kubiak M, Poleski R, Soszynski I, Ulaczyk K, Pietrzynski G and Wyrzykowski L (2012). One or more bound planets per Milky Way star from microlensing observations. Nature 481(7380), 167169.
Cleland CE and Chyba CF (2002) Defining ‘life’. Origins of Life and Evolution of the Biosphere 32(4), 387393.
Clutton-Brock TH, Harvey PH and Rudder B (1977). Sexual dimorphism, socionomic sex ratio and body weight in primates. Nature 269(5631), 797800.
Cohen J and Stewart I (2001). Where are the dolphins? Nature 409(6823), 11191122.
Corning PA and Szathmáry E (2015). “Synergistic selection”: a Darwinian frame for the evolution of complexity. Journal of theoretical biology 371: 4558.
Darwin C (1859). On the origins of species by means of natural selection. London: Murray 247.
Darwin C (1871). The descent of man, and selection in relation to sex. By Darwin Charles. New York, D. Appleton and company.
Davies NB and Houston AI (1981). Owners and Satellites: The Economics of Territory Defence in the Pied Wagtail, Motacilla alba. The Journal of Animal Ecology 50(1), 157.
Davies NB, Krebs JR and West SA (2012) An Introduction to Behavioural Ecology. John Wiley & Sons.
Davies PCW, Benner SA, Cleland CE, Lineweaver CH, McKay CP and Wolfe-Simon F (2009). Signatures of a shadow biosphere. Astrobiology 9(2), 241249.
Des Marais DJ, Nuth JA, Allamandola LJ, Boss AP, Farmer JD, Hoehler TM, Jakosky BM, Meadows VS, Pohorille A, Runnegar B and Spormann AM (2008). The NASA Astrobiology Roadmap. Astrobiology 8(4), 715730.
Diggle SP, Griffin AS, Campbell GS and West SA (2007). Cooperation and conflict in quorum-sensing bacterial populations. Nature 450(7168), 411414.
Domagal-Goldman SD, Wright KE, Adamala K, Arina de la Rubia L, Bond J, Dartnell LR, Goldman AD, Lynch K, Naud M-E, Paulino-Lima IG, Singer K Walter-Antonio M, Abrevaya XC, Anderson R, Arney G, Atri D, Azúa-Bustos A, Bowman JS, Brazelton WJ, Brennecka GA, Carns R, Chopra A, Colangelo-Lillis J, Crockett CJ, DeMarines J, Frank EA, Frantz C, de la Fuente E, Galante D, Glass J, Gleeson D, Glein CR, Goldblatt C, Horak R, Horodyskyj L, Kaçar B, Kereszturi A, Knowles E, Mayeur P, McGlynn S, Miguel Y, Montgomery M, Neish C, Noack L, Rugheimer S, Stüeken EE, Tamez-Hidalgo P, Imari Walker S and Wong T (2016). The Astrobiology Primer v2.0. Astrobiology 16(8), 561653.
Fisher RA (1930). The genetical theory of natural selection: a complete variorum edition. Oxford University Press.
Fisher RM, Cornwallis CK and West SA (2013) Group formation, related- ness, and the evolution of multicellularity. Current Biology, Cell Press, 23(12), 11201125.
Fisher RM, Henry LM, Cornwallis CK, Kiers ET and West SA (2017) The evolution of host-symbiont dependence. Nature Communications, Nature Publishing Group, 8, 15973.
Flores Martinez CL (2014). SETI in the light of cosmic convergent evolution. Acta Astronautica 104(1), 341349.
Foster KR and Wenseleers T (2006). A general model for the evolution of mutualisms. Journal of Evolutionary Biology 19(4), 12831293.
Gardner A (2009). Adaptation as organism design. Biology Letters 5(6), 861864.
Gardner A and Grafen A (2009). Capturing the superorganism: a formal theory of group adaptation. Journal of Evolutionary Biology 22(4), 659671.
Grafen A (1985). A geometric view of relatedness. Oxford surveys in evolutionary biology 2, 28–89.
Grafen A (2003). Fisher the evolutionary biologist. Journal of the Royal Statistical Society: Series D (The Statistician) 52(3), 319329.
Griffin AS, West SA and Buckling A (2004). Cooperation and competition in pathogenic bacteria. Nature 430(7003), 1024.
Hamilton WD (1964). The genetical evolution of social behaviour I and II. Journal of theoretical biology 7(1), 152.
Horneck G, Walter N, Westall F, Grenfell JL, Martin WF, Gomez F, Leuko S, Lee N, Onofri S, Tsiganis K, Saladino R, Pilat-Lohinger E, Palomba E, Harrison J, Rull F, Muller C, Strazzulla G, Brucato JR, Rettberg P and Capria MT (2016). AstRoMap European Astrobiology Roadmap. Astrobiology 16(3), 201243.
Hughes WOH, Oldroyd BP, Beekman M and Ratnieks FLW (2008). Ancestral monogamy shows kin selection is key to the evolution of eusociality. Science (New York, N.Y.) 320(5880), 12131216.
Inglis RF, Ryu E, Asikhia O, Strassmann JE and Queller DC (2017). Does high relatedness promote cheater free multicellularity in synthetic lifecycles?. Journal of Evolutionary Biology 30(5), 985993.
Kuzdzal-Fick JJ, Fox SA, Strassmann JE and Queller DC (2011). High relatedness is necessary and sufficient to maintain multicellularity in Dictyostelium. Science 334(6062), 15481551.
Margulis L (1970). Recombination of non-chromosomal genes in Chlamydomonas: assortment of mitochondria and chloroplasts? Journal of theoretical biology 26(2), 337342.
Moran NA (2007). Symbiosis as an adaptive process and source of phenotypic complexity. Proceedings of the National Academy of Sciences 104 Suppl 1(Supplement 1), 86278633.
Morris SC (2003). The navigation of biological hyperspace. International Journal of Astrobiology 2(2), 149152.
Petigura EA, Howard AW and Marcy GW (2013). Prevalence of Earth-size planets orbiting Sun-like stars. Proceedings of the National Academy of Sciences of the United States of America 110(48), 1927319278.
Pollitt EJ, West SA, Crusz SA, Burton-Chellew MN and Diggle SP (2014). Cooperation, quorum sensing, and evolution of virulence in Staphylococcus aureus. Infection and immunity 82(3), 10451051.
Popat R, Pollitt EJ, Harrison F, Naghra H, Hong KW, Chan KG, Griffin AS, Williams P, Brown SP, West SA and Diggle SP (2015) Conflict of interest and signal interference lead to the breakdown of honest signaling. Evolution. The Society for the Study of Evolution 69(9), 23712383.
Queller DC (1997). Cooperators Since Life Began The Major Transitions in Evolution. John Maynard Smith , Eors Szathmary. The Quarterly Review of Biology 72(2), 184188.
Queller DC (2000). Relatedness and the fraternal major transitions. Philosophical Transactions of the Royal Society B: Biological Sciences 355(1403), 16471655.
Queller DC and Strassmann JE (1998) Kin selection and social insects. Bioscience, Oxford University Press, 48(3), 165175.
Queller DC and Strassmann JE (2009). Beyond society: the evolution of organismality. Philosophical Transactions of the Royal Society B: Biological Sciences 364(1533), 31433155.
Rothschild LJ (2009). Defining the envelope for the search for life in the Universe. Proceedings of the International Astronomical Union 5(H15): 697–698.
Rothschild LJ (2010). A powerful toolkit for synthetic biology: Over 3.8 billion years of evolution. BioEssays 32(4), 304313.
Rumbaugh KP, Trivedi U, Watters C, Burton-Chellew MN, Diggle SP and West SA (2012). Kin selection, quorum sensing and virulence in pathogenic bacteria. Proceedings of the Royal Society B: Biological Sciences 279(1742), 3584.
Schneider D (2016). $100 million seti initiative starts listening for E.T. IEEE Spectrum 53(1), 4142.
Shostak S (2015). Searching for Clever Life. Astrobiology 15(11), 949950.
Smith JM and Szathmáry E (1995). The major evolutionary transitions. Nature 374(6519), 227232.
von Salvini-Plawen L and Mayr E (1977). On the Evolution of Photoreceptors and Eyes. Boston, MA, Springer US: 207263.
Thiergart T, Landan G, Schenk M, Dagan T and Martin WF (2012). An evolutionary network of genes present in the eukaryote common ancestor polls genomes on eukaryotic and mitochondrial origin. Genome Biology and Evolution 4(4), 466485.
West S (2009). Sex Allocation. Princeton, Princeton University Press.
West SA, Fisher RM, Gardner A, and Kiers ET (2015). Major evolutionary transitions in individuality. Proceedings of the National Academy of Sciences 112(33), 1011210119.
West SA, Griffin AS and Gardner A (2007). Social semantics: altruism, cooperation, mutualism, strong reciprocity and group selection. Journal of evolutionary biology 20(2), 415432.
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International Journal of Astrobiology
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