[js1138]

Asteroid impacts might be common, but the timing could be important. I don't think that human like behavior is inevitable. Of course I could be wrong. Sure would be nice to see at least one example of non-terrestrial evolution.

[RadioAstronomer]

I don't think that human like behavior is inevitable.

Neither do I. Hard to make a curve with only one data point. :-)

I certainly do not "believe" in ET. I suspect ET is out there due to the huge number of stars and galaxies, however, I most certainly do not "buy" we have been visited. It's possible, just very unlikely.