First of all I would like to make clear I am not an expert in philosophy.
With the question "Is existence a feature of life?" I mean the following: Could something exist without the presence of an intelligible living being to recognize its existence?
Suppose, for instance, that all form of life in the universe (life in Earth and other possible life "out there") suddenly disappear. How can we know if, for instance, the Eiffel Tower would still be there? Ok, you can say "if there were not any natural disaster it would still be there" but that is not my point. I mean more like, how can we guarantee that atoms and particles would still be there? The existence of Universe itself? The concept of existence would still be possible without life? Because if everyone were dead, who would be there to say "yeah, yeah, Moon still is there on her place..."?
Physicists can say that their rules have consistency and "can guarantee", by "projective previews" that universe would still exist if we were destroyed by an asteroid, but how can they say Physics itself would not be changed, if there were no one to "check" this information? Maybe they could say that their conclusions are "imortal" because they came from "reason". But is it not reason itself a feature of human brain, hence, a feature of life?
I want to know if some philosopher have discussed this subject. Any references?