There is considerable speculation as to why the observable universe is composed almost entirely of ordinary matter, as opposed to an equal mixture of matter and antimatter.
This asymmetry of matter and antimatter in the visible universe is one of the great unsolved problems in physics.[2]
Oops! Sorry. Intended post 28 for this other thread that I posted.
Excess antielectrons arent from nearby dead stars, study says
ScienceNews.com ^ | November 16, 2017 | Emily Conover
http://freerepublic.com/focus/chat/3608157/posts