Please read the New York Times article at the bottom of this post. It's a really interesting article about newly found giant energy bubbles! After reading it, see if you can answer my questions and comment!

What is one possible source of the giant energy bubbles in the middle of our galaxy?

If dark matter collides, what might it produce?

The amount of energy formed in these bubbles is about the amount of how many super nova explosions?

http://www.nytimes.com/2010/11/10/science/space/10galaxy.html?ref=astronomy_and_astrophysics