Understanding Dark Matter: What We Don't Know

I saw this great video on Boing Boing and thought I'd share in light of the new dark planets discovery. I've read comments on a few sites that the rogue, Jupiter-like planets must help explain the massive amounts of dark matter out there in the universe. Judging by what I've read elsewhere--and this cool animated film--it's more complicated than meets the eye. Stuff like this is part of the reason I love astronomy, it's still new and we still don't know a lot!

Enjoy!