I find this and near-future solar flares and coronal mass injections to be interesting experimentally. I'm waiting to see if any of them will have an effect on our tech. and the power grid. That and I'm waiting for the day I can see an aurora borealis in Chicago with my naked eye.
Birejji - http://birejji.com Was earning $100/day with adsense as a normal chat site (with 2M+ impressions per Month), but adsense banned the site due to "fraudulent clicks" (I've always had a consistent CTR so no idea what happened there). Since then it's turned into a Paid to Chat site.