ALIENS DO THEY EXIST

Aliens what u think do they really exist i have a strong opinion that u think that am i joking but it is true hundreds of "UFO sightings" are all over the world by the peoples just like you and me.

     Our world is full of such incidents the officials are hiding many such things from us but naming  such incidents as just a army drill of balloon model aircracft and many other fake conclusions about the incidents about  95% of the incidents are explained by the officials as army training exercises but what about 5% that are not explained yet  a probability is a probability even it is 5% .So 5% of these unexplained official things what could be that anyone know cause they are unexplainable .
What u think but an American scientist and American communicator and popularizer of science what he thinks about aliens you probably get stunned after watching a video and his thoughts about the great alien mystery.