Comment: 5 pages, 2 figures + Supplementary Material. Comments are welcome! v2: Minor clarifications added. References added. Expanded Table 1 and moved it to the main text. Results and conclusions remain unchanged. Matches Letter published in EPJC. Ancillary file conta...

At present, cosmological observations set the most stringent bound on the neutrino mass scale. Within the standard cosmological model ($\Lambda$CDM), the Planck collaboration reports $\sum m_\nu < 0.12\,\text{eV}$ at 95% CL. This bound, taken at face value, excludes man...

It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated d...