The Potential for Silicon-Based Life on Io
Keywords:
Speculative evolution, Chemistry, Biology, Astrobiology, Space, Silicon-Based Life, IoAbstract
What if Io, Jupiter’s volcanic moon, could host life based on silicon rather than carbon? With intense volcanic activity and a sulphur-rich atmosphere, Io’s conditions could support silicon-based biochemistry, challenging our understanding of life’s potential. Further research and exploration are needed to determine if life beyond Earth could exist here.
References
McKay, C.P. (2014) Requirements and limits for life in the context of exoplanets, Proceedings of the National Academy of Sciences, 111(35), pp. 12628–12633. DOI: 10.1073/pnas.1304212111
Lopes, R.M.C., De Kleer, K. & Tuttle Keane, J. (eds) (2023) Io: A New View of Jupiter’s Moon. Cham: Springer International Publishing (Astrophysics and Space Science Library). DOI: 10.1007/978-3-031-25670-7
Schaefer, L. & Fegleyjr, B. (2005) Silicon tetrafluoride on Io, Icarus, 179(1), pp. 252–258. DOI: 10.1016/j.icarus.2005.05.020
Petkowski, J.J., Bains, W. & Seager, S. (2020) On the Potential of Silicon as a Building Block for Life, Life, 10(6), pp. 84. DOI: 10.3390/life10060084
Williams, D.A., Keszthelyi, L.P., Crown, D.A., Yff, J.A., Jaeger, W.L. Schenk, P.M., Geissler, P.E. & Becker, T.L. (2011) Volcanism on Io: New insights from global geologic mapping, Icarus, 214(1), pp. 91–112. DOI: 10.1016/j.icarus.2011.05.007
Jessup, K.L. & Spencer, J.R. (2012) Characterizing Io’s Pele, Tvashtar and Pillan plumes: Lessons learned from Hubble, Icarus, 218(1), pp. 378–405. DOI: 10.1016/j.icarus.2011.11.013
De Kleer, K., Hughes, E.C., Nimmo, F., Eiler, J., Hofmann, A.E., Luszcz-Cook, S. & Mandt, K. (2024) Isotopic evidence of long-lived volcanism on Io, Science, 384(6696), pp. 682–687. DOI: 10.1126/science.adj0625
Davies, A.G. & Vorburger, A.H. (2022) Io’s Volcanic Activity and Atmosphere, Elements, 18(6), pp. 379–384. DOI: 10.2138/gselements.18.6.379
Wong, M.C. & Smyth, W.H. (2000) Model Calculations for Io’s Atmosphere at Eastern and Western Elongations, Icarus, 146(1), pp. 60–74. DOI: 10.1006/icar.2000.6362
Bowman, A. (2008) Io: The Prometheus Plume. NASA. Available at: https://www.nasa.gov/image-article/io-prometheus-plume/ [Accessed: 4 March 2025]
Peng, S. (2015) Silicon-Based Life in the Solar System, Silicon, 7(1), pp. 1–3. DOI: 10.1007/s12633-014-9254-7
Gobato, R., Heidari, A., Mitra, A. & Valverde, L.F. (2022) The possibility of silicon-based life, Bulletin of Pure & Applied Sciences- Chemistry, 41c(1), pp. 52–58. DOI: 10.5958/2320-320X.2022.00007.3
Rampelotto, H.P. (2010) The Search for Life on Other Planets: Sulfur-Based, Silicon-Based, Ammonia-Based Life, Journal of Cosmology, 5, pp. 818–827. Available at: https://ui.adsabs.harvard.edu/abs/2010JCos....5..818R [Accessed: 22 January 2025]
Lodders, K. & Fegley, B. (2024) Sulfur in the Giant Planets, their Moons, and Extrasolar Gas Giant Planets. Preprint of chapter for "The Role of Sulfur in Planetary Processes: from Atmospheres to Cores", D. Harlov and G. Pokrovsky (Eds.), Springer Geochemistry. arXiv. DOI: 10.48550/ARXIV.2410.11138
Hautaluoma, G. & Handal, J. (2020) NASA Selects Four Possible Missions to Study the Secrets of the Solar System. Available at: https://www.nasa.gov/news-release/nasa-selects-four-possible-missions-to-study-the-secrets-of-the-solar-system/ [Accessed: 17 March 2025]
Zakarian Group (2004) Table 4.11 Bond Dissociation Energies, in Properties of atoms, radicals and bonds. University of California Santa Barbara. Available at: https://labs.chem.ucsb.edu/zakarian/armen/11---bonddissociationenergy.pdf [Accessed: 14 March 2025]
Bao, H., Yu, S. & Tong, D.Q. (2010) Massive volcanic SO2 oxidation and sulphate aerosol deposition in Cenozoic North America, Nature, 465(7300), pp. 909–912. DOI: 10.1038/nature09100
Cammack, R. (1992) Iron-Sulfur Clusters in Enzymes: Themes and Variations, in Advances in Inorganic Chemistry. Elsevier, pp. 281–322. DOI: 10.1016/S0898-8838(08)60066-5
Grabowsky, S., Hesse, M.F., Paulmann, C. Luger, P. & Beckmann, J. (2009) How to Make the Ionic Si−O Bond More Covalent and the Si−O−Si Linkage a Better Acceptor for Hydrogen Bonding, Inorganic Chemistry, 48(10), pp. 4384–4393. DOI: 10.1021/ic900074r
Stetter, K.O. (2006) Hyperthermophiles in the history of life, Philosophical Transactions of the Royal Society B: Biological Sciences, 361(1474), pp. 1837–1843. DOI: 10.1098/rstb.2006.1907
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