I've recently been going through the site and merging some of the related threads. Like space exploitation or climate change stuff that is similar. I've tried to do it logically so it still reads well without going off topic. So for example I've created a NASA thread for all the NASA development stuff but kept the individual missions in their own threads. The main thinking behind this is I want to encourage people to add to a debate or developing story more than just posting new topics all the time. Obviously I'm not against new topics, the idea is to try and keep relevant posts together so it's easier to see the whole picture and how sticky subjects change over time.