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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

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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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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