Planck 2015 CMB spectra, compared with the base ΛCDM fit to PlanckTT+lowP data (red line). The upper panels show the spectra and the lower panels the residuals. In all the panels, the horizontal scale changes from logarithmic to linear at the “hybridization” scale, ℓ = 29 (the division between the low-ℓ and high-ℓ likelihoods). For the residuals, the vertical axis scale changes as well, as shown by different left and right axes. We show for TT and TE, but C_ℓ for EE, which also has different vertical scales at low- and high-ℓ.