RedNova Science News...Linked to CasaleMedia????

Hi guys. I hope I'm not putting this in the wrong place or anything, if I have I apologize in advance.

I noticed something rather strange. I was looking at a website when this pop-up showed up.(Well, it was a thumbnail of it since my Pop-up Blocker caught it.) The pop-up ad was for RedNova; I did a search for it on Yahoo and discovered it's supposed to be a science news site, however, when you click on the ad, it opens up a CasaleMedia ad...very strange. Thank goodness, I have all CasaleMedia sites in Restricted Sites and am running IE-SpyAd. Still, this concerned me as there are people who like reading about Astronomy and to have a site supposedly dedicated to it, be one that is owned by some known spyware pushers....

Edit: I put hxxp://rednova.com in the Restricted Sites for IE. Not taking any chances.