Just after the big bang, the Higgs field was zero, but as the universe cooled and the temperature fell below a critical value, the field grew spontaneously so that any particle interacting with it acquired a mass. The more a particle interacts with this field, the heavier it is. Particles like the photon that do not interact with it are left with no mass at all. Like all fundamental fields, the Higgs field has an associated particle – the Higgs boson. The Higgs boson is the visible manifestation of the Higgs field, rather like a wave at the surface of the sea.
http://home.cern/topics/higgs-boson/origins-brout-englert-higgs-mechanism
...but as the universe cooled and the temperature fell below a critical value, the field grew spontaneously so that any particle interacting with it acquired a mass.
So reduction in temperature falling to below a critical value caused the field to grow spontaneously. If the temperature was raised above this critical value then the Higg's field would not function where any particle passing through it would not acquire mass.
Reducing particle mass is the key to creating an E-R bridge.
Folding an area of space to create a shorter distance between two points is not possible in space time to allow an object to pass through the Fold and emerge on the other side in a far off part of the galaxy.
Reducing particle mass between two points that you are passing through in space-time would reduce the constant push of gravity on an object from all sides allowing the object to travel faster through the conduit will experiencing less gravitational influences.
Think of if this way.
You have a wall in front of you that is a foot thick and made of solid wood. An object would have to use tremendous force to penetrate the solid wood wall and continue travelling.
But if the solid wood wall was reduced in particle mass it would still remain a a foot in thickness but the object would not have to exert an extra amount of force to pass through the solid wood wall.
The object could actually increase in velocity and occupy more space-time.
Dark Matter and Dark Energy are still forms of matter. They are not like protons and photons that do not interact with a Higgs field which must interact with the Higg's field that assists with adding mass to a particle otherwise the expanse of the Universe would have continued at faster than light speed velocities.