[Mariner]

“Scientists believe that quark-gluon plasma filled the entire Universe during the first few microseconds after the Big Bang”

OK physics students, please answer me this:

1. How did these particles inhabit 10s of billion of light years, perhaps infinite light years of cubic space, from a single point, in a few microseconds? or...
2. Is the universe bounded by the extent of matter from the big bang, and is expanding as a result of that explosion of matter?

Did Einstein address this?

[ETL]

“Scientists believe that quark-gluon plasma filled the entire Universe during the first few microseconds after the Big Bang” OK physics students, please answer me this: 1. How did these particles inhabit 10s of billion of light years, perhaps infinite light years of cubic space, from a single point, in a few microseconds?

After the "first few microseconds" the universe was still fairly tiny?