Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.


Shedding light on the fabric of space-time

The idea that space-time might be fundamentally fuzzy is much debated among theorists. A search for signatures of this effect on light from distant cosmic sources has come up empty-handed, but shows the potential of this approach.

This is a preview of subscription content, access via your institution

Access options

Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Figure 1: Bumpy journeys.


  1. Stachel, J. in 100 Years of Relativity (ed. Ashtekar, A.) 3–36 (World Scientific, 2005).

    Book  Google Scholar 

  2. Tamburini, F., Cuofano, C., Della Valle, M. & Gilmozzi, R. Astron. Astrophys. 533, A71 (2011).

    ADS  Article  Google Scholar 

  3. Wheeler, J. A. Geometrodynamics (Academic, 1962).

    MATH  Google Scholar 

  4. Carlip, S. Rep. Prog. Phys. 64, 885–942 (2001).

    ADS  CAS  Article  Google Scholar 

  5. Amelino-Camelia, G. Nature 398, 216–218 (1999).

    ADS  CAS  Article  Google Scholar 

  6. Ng, Y. J. & van Dam, H. Found. Phys. 30, 795–805 (2000).

    Article  Google Scholar 

  7. Lieu, R. & Hillman, L. W. Astrophys. J. 585, L77–L80 (2003).

    ADS  Article  Google Scholar 

  8. Ragazzoni, R., Turatto, M. & Gaessler, W. Astrophys. J. 587, L1–L4 (2003).

    ADS  Article  Google Scholar 

  9. Christiansen, W. A., Ng, Y. J., Floyd, D. J. E. & Perlman, E. S. Phys. Rev. D 83, 084003 (2011).

    ADS  Article  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Giovanni Amelino-Camelia.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Amelino-Camelia, G. Shedding light on the fabric of space-time. Nature 478, 466–467 (2011).

Download citation

  • Published:

  • Issue Date:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing