Extraordinary claims require extraordinary evidence

Do you believe in evolution? Or not? Do you believe what astronomers have been officially reporting? Or not? Do you understand all the implications of biological research? Or not? Do you understand the full implications of nanotechnology? Or not? ET's could live many orders of magnitude longer than modern humans. They could design machines that could remain operational for millions, even billions, of years. To say nothing of having scientific and technical knowledge far beyond ours.

Your committed belief that there are no ETs, and/or that they've never visited our solar system, has no basis in modern science. In fact, it amounts to an "extraordinary claim."