Considering the vastness of space, the immensity of the cosmos we search, it seems unlikely that we would ever find evidence of extraterrestrial life in the form of beacons or radio messages.
However, perhaps that is not the case at all, maybe the messages from aliens are frequent and we are just not looking in the right part of the sky at the proper time. Moreover, perhaps we are not detecting alien signals because we are misinterpreting them. Some wonder if pulsars-quickly rotating neutron stars that periodically emit radiation-could be alien beacons.
Read More.......
Source: mysteries-and-strangeness.blogspot.com