Quotes on Intelligent Life

Other intelligent life-forms will differ greatly in appearance - they may resemble the creature in E.T. or startle us with their beauty - but life itself is common, I'm certain.

We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet.

The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.

We only have to look at ourselves to see how intelligent life might develop into something we wouldnt want to meet. I imagine they might exist in massive ships, having used up all the resources from their home planet. Such advanced aliens would perhaps become nomads, looking to conquer and colonize whatever planets they can reach.

Perhaps we’ve never been visited by aliens because they have looked upon earth and decided there’s no sign of intelligent life.

and we’ll be saying a big hello to all intelligent life forms everywhere … and to everyone else out there, the secret is to bang the rocks together, guys.

Intelligent life on other planets? I'm not even sure there is on earth!

Don't try to be brave when it is enough to be intelligent.

It is surely unreasonable to credit that only one small star in the immensity of the universe is capable of developing and supporting intelligent life. But we shall not get to them and they will not come to us.

[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth.