A compilation show, where I take a look at why some meteors explode. For example, the Chelabinsk meteor in Siberia, how we radioactively date rocks - and how at one time it was the physicists consulting the historians, not the other way around. I also discuss the formation of stars with Mike Mc Phee, and takes a look at Radiation and Marie Curie. Lastly, I interview Dr. Toner Stevenson about early astronomy in Australia and the contribution of women to an early catalogue of stars in the sky.