Hello! I am a master student, and I am about to start working on my master thesis, which, in my counrty, is a substantial work of 6 months which usually involves original research. I will be supervised by two professors of Statistical Mechanics, who have many research interest. In these days, we have to start talking about the topic of my thesis. I would like to be able to propose them a topic which is connected to General Relativity or Cosmology, or even Particle Physics. I have read around the Internet but I have not been able to find something which I could really propose as a topic. I had thoug about something like Statistical Mechanics- Phase transitions- Spontaneous symmetry breaking, but I am not able to find, say, a review to become enough knowledgeable to talk to my professors. I continue to read that Statistical Mechanics is very often used in General Relativity and Cosmology, but I cannot see precisely why. Can please anyhone help me? Thanks in advance!