There was no 'before' the beginning of our universe, because once upon a time there was no time.
When we talk about stem cells, we are actually talking about a complicated series of things, including adult stem cells which are largely cells devoted to replacing individual tissues like blood elements or liver or even the brain.
In this great age of communication, there a lot of people you can't actually understand. I know everyone tweets, and twits and texts and all that, but actually we've all got voices, and it is awfully nice to hear them and if you can understand what people are saying.

