Analyses of COBE, WMAP, and Planck CMB temperature maps at low multipoles (roughly l?50) show an apparent excess of power in odd multipoles compared to even ones, corresponding to a preference for point-parity antisymmetry that is not expected in the statistically isotropic, parity-neutral ΛCDM model (Kim & Naselsky 2011; Zhao 2014). This “odd-parity preference” is closely related to the lack of large-angle correlation and appears direction-dependent, so within ΛCDM it typically demands either finely tuned primordial conditions, unusual cosmic topology, or subtle systematics/foreground explanations, none of which arise naturally in the simplest hot Big Bang plus inflation picture (Land & Magueijo 2005; Gruppuso et al. 2011).