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Associate Editor: Sophie Molholm A., T. I.Shiramatsu, H.Takahashi, and Z. C.Chao. 2026. ““Nothing” Really Matters: What Omission Responses Reveal About the Predictive Brain.” European Journal of Neuroscience63, no. 10: e70566. Yaron, https://doi.org/10.1111/ejn.70566. Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement Data sharing is not applicable to this article; no new datasets were generated or analyzed.

Due to their cosmological distances high-energy astrophysical sources allow for unprecedented tests of fundamental physics. Gamma-ray bursts (GRBs) comprise among the most sensitive laboratories for exploring the violation of the central physics principle of Lorentz invariance (LIV), by exploiting the spectral time lag of arriving photons.

Abstract The existence of scalar fields can be probed by observations of stochastic gravitational waves. Scalar fields mediate attractive forces, usually stronger than gravity, on the length scales shorter than their Compton wavelengths, which can be non-negligible in the early Universe, when the horizon size is small. These attractive forces exhibit an instability similar to the gravitational instability, only stronger. They can, therefore, lead to the growth of structures in some species.