Along the starway of infinity there are millions of planets just like Earth. We need not be concerned with them. There are however many billions more that are not like Earth – these represent the biggest threat to humankind.
A slow moving, fragile rudimentary craft from the United States pierced the murky atmosphere of Jupiter on July 4, 2016. Strange cries, shouts and howls were captured by the ships aural detectors. The voices, if indeed they were voices, were not made by carbon based lifeforms. The Space Agency quickly issued reports that derided the cries as nothing more than some sort of interference or radio static.
The collective mind of Earthlings however, is beginning to grasp the concept of intelligent life that is not carbon based. Such lifeforms may not even appear to be lifeforms to the primitive brains of the homo-sapiens.