i have heard the stars 'sing', 30 yrs before the radio telescope revealed that, indeed, the stars are emitting radio waves. who can prove they are not singing to each other, as whales do?
i have experienced other dimensions, OBE's and NDE's among others. the universe seemed conscious to me. so, in lieu of any evidence to the contrary, and in view of all the evidence of my own experiences, i choose to believe and act as if the universe is conscious.
the real question is: are YOU conscious, and how much?