Check out an interesting article about our universe:

http://space.newscientist.com/article/dn12897-monster-black-holes-power-highestenergy-cosmic-
rays.html

If volcanoes are your thing, check out this from Yellowstone:
http://environment.newscientist.com/article/dn12896-magma-surge-causes-record-rise-at-
yellowstone.html