Quotes about Extraterrestrial

Perhaps, in retrospect, there would be little motivation even for malevolent extraterrestrials to attack the Earth; perhaps, after a preliminary survey, they might decide it is more expedient just to be patient for a little while and wait for us to self-destruct.

The chance of receiving a signal from a civilization exactly as advanced as we are should be minuscule. If they were even a little behind us, they would lack the technological capability to communicate with us at all. So the most likely signal would come from a civilization much more advanced.

The total number of such worlds are, as I said, something of the order of a trillion, or 10^12, a one followed by twelve zeros, of which Earth represents just one, all in the family of the Sun. And our star, of course, is one of a vast multitude.

Then she snapped her fingers and we were standing on Europa, discussing the possibility of extraterrestrial life beneath the moon's icy crust. I

Issuing an insurance policy against abduction by aliens seems a pretty safe bet.

I think it would be arrogant and borderline foolish to believe there's no other life forms that exist out there.

The human race may be the only intelligent beings in the galaxy.

It is a sobering thought that Gomer Pyle and the Beverly Hillbillies may be among our chief interstellar emissaries.

If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else.

This intelligent life need not be anything like humans. Little green men would do as well. In fact, they might do rather better. The human race does not have a very good record of intelligent behaviour.

Science fiction is filled with Martians and space travel to other planets, and things like that.

I occasionally think how quickly our differences worldwide would vanish if we were facing an alien threat from outside this world.