Hello World Human population! We are your Cousins. We are terrestrial Primates, like you, having ancestors the same as in your Homo Sapien line millions of years past. We have stayed behind in our planetary system, while much of our kind have been traveling to the stars. Like you, we climbed down from the trees, but went underground for safety. We now fly our craft to the Moon and Mars, then back through underwater caves to our small towns of compartments under the Earth`s surface.. Some of our flights are purely recreational but we have spent much of our resources studying & watching your species since your development of nuclear devices. Over millions of years, our skin has greyed and our eyes have evolved due to lighting conditions underground. We find life comforting there, as the Sun`s radiation is now harmful to our skin and eyes. Our one imperative on this planet is to live in peace. This is why our portals can never be breached and contact is out of the question.