This link has already been posted here once, I believe. And as I have said before, as of right now, we can only assume what really happened. A large part of the information on that page is speculation, except for the most concrete facts, already highlighted by the developers or in the Half-Life games themselves.
yea dude i posted that her i think it was the 3rd page but i know i already posted it her so read/scroll thrugh the pages next time to see if the lik u want to place has already been placed next time
I didn't make it!
This explains a lot. Edit oops just found link was posted