Wideness of niche. That's a good one. Once we become trans-planetary, I guess that will also be quite a distinguishing trait. Also, note my optimism :P Akin to

Wideness of niche. That's a good one. Once we become trans-planetary, I guess that will also be quite a distinguishing trait. Also, note my optimism :P Akin to the brain-to-body-mass ratio that you mention, I wonder if this wideness of niche idea can be meaingfully quantified. Would you be able to point me to some sources? I'd like to level up a little bit on this topic.