the concocted word singularity hides the fact that the largest number that could be conceived is not even the smallest fraction of infinity. if a singularity has any dimension at all then its density is always finite.

other life forms in the universe yes. seti a complete waste of time and money. distances too far. radio transmissions would need billions of kilowatts to reach us.

present theory of pulsars incorrect. in a dynamic universe probability of picking up a continuous signal too small. pulse needs to be in all directions . probably from star swelling and collapsing within defined parameters

signals from edge of universe showing beginings of big bang incorrect. all such signals would have passed us billions of years ago if big bang correct.

all galaxies contain billions of black holes. after all a star would not recognise the proximity of a black hole it would assume it was still a star with a somewhwat reduced mass at formation .but still at the same distance with a similar gravitational attraction.