The soul of Habitablezone is in the Space Board, where it was born, and in my opinion, what really keeps it going. There you will find people contributing from around the world - for starters, Raoul, Nick Hoffman, Doug Ellison, Adam, and others.

From that perspective, the rest of Habitablezone - all the boards - could maybe be described as "Community" - not really the main game. .. from that perspective.

Note that many of the international contributors from Space rarely, or never, post on the other boards. In my case, curiosity and sociability led me to the other boards. But things get up my nose sometimes.