Its a matter of 64 years, at the close of WW2 since a few Norwegian Radio Astronomers, first encountered the CBR. Continuous searches for intelligent have yeilded nothing.
One possible reason that we are alone, at least in the home Galaxy is the fine balance of conditions neccessary to support life. Therefore any major imbalance may preclude its development.
Such a factor is the inclination of the Solar Core to the ecliptical that generates the massive twin spirals inside the Sun. In the event that a Sun like star existed, but failed to pass the 7 degree ecliptical
condition, then the star in question would be of "oblate" configuration, and a planet sinilar to Earth, in a similar orbit , would possess a disproportionately high temperature.
Kevin Wilson