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I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.Stephen Hawking
Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.Stephen Hawking
You cannot look up at the night sky on the Planet Earth and not wonder what it's like to be up there amongst the stars. And I always look up at the moon and see it as the single most romantic place within the cosmos.Tom Hanks
Of all celestial bodies within reach or view, as far as we can see, out to the edge, the most wonderful and marvellous and mysterious is turning out to be our own planet earth. There is nothing to match it anywhere, not yet anyway.Lewis Thomas
We can pay the ecological debt by changing economic models, and by giving up luxury consumption, setting aside selfishness and individualism, and thinking about the people and the planet Earth.Evo Morales