End-of-the-week wrap covering the historical first ever detection of CNO neutrinos by Borexino, the ingredients required for a modified gravity theory to replace dark matter, and how to search for new light particles using the black hole mass gap.
Physics
My thoughts on what the Hubble tension really is, based on George Efstathiou’s “To H0 or not to H0?“, arXiv:2103.08723.
