Where do ViralNova takes his articles from?

Hey everyone,
I am trying to make website similar to Viral Nova, and I have pretty hard time to find interesting niches that have a chance to go viral. Can anyone please share some sources of articles that might go viral, or went viral before? From where Viral Nova takes the article niches?

Thanks!

I currently launched ViralWorthy net with similar goals. I have close to 100 articles. 3 of those are my own. Those 3 are the top 3 viewed/shared posts on my website.

Avoid being like the others and come up with your own content. Lesson I'm teaching myself too.

This may sound rude but if you can't even find articles to share, how to expect to sustain your project? These websites post on average 10 articles a day. I personally spent 18 hours a day looking and refining content/articles to get 8-10 posted per day.