Like several times before, GamingSteve has a new exclusive concept art of Spore. This time it shows a firepit as it goes through three different stages. In his podcast, Steve says he has more sketches which he'll release over the next few weeks. These artworks also show that, besides creatures, the objects and buildings will evolve too. He also tells that within being a society, there are substeps. For example, the city-building phase has several subsections in it. You can see the artwork below, and listen to the podcast at GamingSteve.