https://youtu.be/KiwG6r-9gcwAs i am getting on top of the production of these Podcasts, I have less to think about and will try improving the depth and colour of the explanations.  DOS is doing my head in! So messy as I build it not knowing the errors I am going to make. At any rate Henrietta Leavitt is very interesting to think about https://youtu.be/KiwG6r-9gcw      This play seems to be very unlikely,  I really gets me thinking. Podcast http://www,lessonpeer.com/drhillteach/Hubble Expansion nice and easy.mp3