This one is about Cosmology and the story of Halton Arp now and again I like to do the odd post about people in science. Most of the time we tend to stick with the firm favourites, Einstein, Newton, Schrodinger, Heisenberg, maybe Steven Hawking and so on. These are the people that are the mega stars of the business. There are loads of others, many people that most of us have never heard off. A dude I know recently went to a University to study physics, during his application interview he didn't realise that the guy interviewing him was actually a Nobel prize winning physicist. What made it funnier was they guy actually asked him "do you know who I am?" and he replied "no, sorry, I have no idea!" Despite this faux par he still got a place. My point is that there are lots of famous physics people who are actually only famous to those in the specific sub field within physics, outside of it, not one has heard of them and this is true of any profession. One such person is a guy called Halton Arp who died back in 2013.