1. Introduction

2. Integrated Sachs-Wolfe effect

2.1. The ISW probed through the CMB-LSS cross-correlation

2.2. Parameterization of early and late ISW and data analysis

3. CMB low multipoles anomalies

4. Features in the primordial fluctuations

5. Primordial non-Gaussianity

6. Limits on neutrino masses from cosmology and particle physics

6.1. Neutrino parameters, method and data

6.2. Results

7. Robustness of cosmological thermal axion mass bounds

8. Cosmological constraints on the neutron lifetime

9. Testing general relativity with cosmic polarization rotation

9.1. Current problems and future prospects

10. SKA contribution to future CMB spectrum experiments