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Time to consider search strategies for complex life on exoplanets

Upcoming telescopes might be able to detect signatures of complex life on other worlds, but we need to involve physical, chemical and life scientists at the planning stage in order to interpret the findings when the time comes.

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Fig. 1: False-colour image of Earth at a wavelength of 450–1,100 nm.

NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington


  1. Catling, D. C. et al. Preprint at (2017).

  2. Seager, S., Bains, W. & Petkowski, J. J. Astrobiology 16, 465–485 (2016).

    Article  ADS  Google Scholar 

  3. Segura, A., Kasting, J., Meadows, V., Cohen, M. & Scalo, J. et al. Astrobiology 5, 706–725 (2005).

    Article  ADS  Google Scholar 

  4. Schulze-Makuch, D. & Irwin, L. N. Life in the Universe: Expectations and Constraints (Springer, Berlin, 2008).

  5. Ward, P. & Brownlee, D. Rare Earth: Why Complex Life is Uncommon in the Universe (Springer, Berlin, 2000).

  6. Shostak, S. G. Int. J. Astrobiol. 2, 111–114 (2003).

    Article  Google Scholar 

  7. Schulze-Makuch, D. & Bains, W. The Cosmic Zoo: Complex Life on Many Worlds (Springer Praxis, Cham, 2017).

  8. António, M. R. S. & Schulze-Makuch, D. Hypotheses Life Sci. 2, 4–14 (2012).

    Google Scholar 

  9. Schulze-Makuch, D. et al. Proc. Natl Acad. Sci. USA (2018).

  10. Lelieveld, J. et al. Nature 452, 737–740 (2008).

    Article  ADS  Google Scholar 

  11. Cowan, N. B., Greene, T., Angerhausen, D., Batalha, N. E., Clampin, M. Publ. Astron. Soc. Pacif. (2015).

  12. Robinson, T. D., Meadows, V. S. & Crisp, D. Astrophys. J. 721, L67–L71 (2010).

    Article  ADS  Google Scholar 

  13. Zugger, M. E., Kasting, J. F., Williams, D. M., Kane, T. J. & Philbrick, C. R. Astrophys. J. 739, 12 (2011).

    Article  ADS  Google Scholar 

  14. Schulze-Makuch, D. & Guinan, E. F. Astrobiology 16, 817–821 (2016).

    Article  ADS  Google Scholar 

  15. Arnold, L., Gillet, S., Lardière, O., Riaud, P. & Schneider, J. Astron. Astrophys. 392, 231–237 (2002).

    Article  ADS  Google Scholar 

  16. Schwieterman, E. W. et al. Preprint at (2016).

  17. Mennesson, B. et al. Proc. SPIE 9904, (2016).

  18. Walker, S. I., Bains, W., Cronin, L., DasSarma, S. & Danielache, S. Preprint at (2018).

Download references


Dirk Schulze-Makuch acknowledges support from ERC Advanced Grant ‘HOME’ (No. 339 231).

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Correspondence to Dirk Schulze-Makuch.

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Schulze-Makuch, D., Bains, W. Time to consider search strategies for complex life on exoplanets. Nat Astron 2, 432–433 (2018).

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