This title seems rather exciting although the content is somewhat different than what you might be dreaming about:
What's the matter? Using the X-ray Chandra observatory, they have seen an explosion that probably threw visible matter and dark matter in different directions. I guess that we won't learn what the dark matter actually is but what we may get is a new, more direct proof of the existence of dark matter.
Actually, you can see more accurate information about the discovery in this abstract.
Thanks to Sabine.