we don't really know how and why life came about and how representative it might be of a broader phenomenon unfolding across the universe. but anything else of that nature happening around here would have to have a minuscule footprint in terms of the conventional physics / standard model to successfully evade serendipitous detection in any of the countless and very diverse measurements across physics, chemistry, biology and various engineering disciplines worldwide (and for more than a century)

missing pieces (as we now understand the world) show up only when the puzzle reaches cosmological scales. of-course it would be extremely exciting if something "invisible" had a faint trace in our lowly spacetime neighborhood. but as Feynman might have said, the Universe is what it is and it is not hear to entertain us (nor drive clicks onto aerospace company blogs)