Darwin's Extraterrestrials

[MarkCharles]

3. Well, assuming we all agree about the big bang as the starting point

of the universe, and that there are billions of stars in various galaxies out there, we can reasonably predict that the laws of physics, (e.g. gravity, chemistry, etc.) apply in all realms and to all stellar orbital objects, (planets, moons, asteroids, etc).

Assuming, also that the general process of evolution of living things progresses in a similar fashion elsewhere as it does here, it would be highly unlikely that a civilization of any advanced beings equal or surpassing Earth's human beings would be more than a few million years more or less advanced than what we find on our Earth. Of the 4.54 billion years since the formation of our planet, hominid type organisms have been around a distinctly short period of time, with our branch from ancestors of the modern chimp having happened just 5-7 million years ago.