if you listen to what pat says to the others. Cera, Ducky, Petrie and Spike.
He tells them that a elcipses came a long time ago and that his grandpa I think it is told him that story that a group of longnecks was at the hole when it happened so generations later it happens again and those from the family tree line from those get a dream telling which is mixed with instinct to go back to this place which their eariar genrations came too.
