posted on May, 21 2007 @ 04:22 PM
I'm assuming for a moment that you may be referring to a sentient race other than humans and other than other extant, endemic species of Earth we are
aware of.
If that is what you are asking, then (IMHO) my answer is that I believe other indigenous sentient beings of which we are unaware do not exist. If
they do, they prefer to keep themselves extremely well-hidden, use almost no resources, have managed to remain undetectable by an exponentially
increasing variety of devices and human groups designed to detect them, and have managed to exist and thrive virtually invisible on a planet teaming
with billions of curious, suspicious observers. Intriguing as this concept may be, I don't think it is true.
Rather, I believe it is possible, likely even, that a number extragenous beings have come to Earth and gone, some of them multiple times, and some of
them concurrently. It is these sentient beings that have, if only periodically, existed and shared the Earth with human beings.