175: Tetraquark Plus, a little bit of David Attenborough appreciation, why uncles are great, and good news on global access to electricity, human rights in Sierra Leone, rhino conservation in Mozambique, and some truly astonishing clean energy news from the UK. Physicists at ATLAS, the general-purpose particle physics experiment at the LHC, have found evidence of a four-charm-quark (also called “di-charmonium”) excess. We have no idea what any of these things mean but it all sounds very impressive. This post is for paying subscribers only Subscribe now Already have an account? Sign in.