One of us, Oldman, had a suggestion recently that relates to the puzzle about the scarcity of antimatter. He mentioned the book by Helen Quinn and Yossi Nir. I haven't read this book so I can't recommend it, but I will pass along the tip. It is a popular-written book. Witty title, cute cover---supposed to look like a murder mystery or detective-story---The Mystery of the Missing Antimatter. By particle physicists but for wide audience. Here is an interview with the two authors http://www.powells.com/tqa/yossi.html We have another thread going in Cosmology forum about somebody else's notion of why anti is scarce. What I hope is, someone who has read this book will tell us, in brief, what Quinn and Nir say. Or maybe not even what they say, maybe forget Quinn and Nir and just sketch in brief what the conventional story is. When you start discussing a nonstandard cosmology idea it is generally good to first establish what the standard view is---so we all have that as a starting point. IOW if you are deviating, first describe what you are deviating from---if you are proposing an alternative first describe the usual model that it is an alternative to. I hope I'm correct in assuming that what Quinn and Nir provide is the usual notion or notions, the prevailing ideas of why antimatter is scarce. this page gives you links so you can scan the TOC to scope what their approach is. http://press.princeton.edu/titles/8475.html Here's the TOC http://press.princeton.edu/TOCs/c8475.html I'm counting on Oldman to contribute some comment because he brought it up and recommended.