This week, we're journeying into the world of the smallest objects known to humanity: the tiny particles that make up us and the entire universe around us. Plus, in the news, getting the world vaccinated against COVID-19 - half the global population have been jabbed so far, but the many countries in the Global South lag far behind; the Nobel prizes are announced; and, have scientists finally solved the biggest problem of them all: leaves on the line delaying trains... Like this podcast? Please help us by supporting the Naked Scientists