We may have charted all the continents on the planet, and we may have discovered all the mammals, but that doesn't mean that there's nothing left to explore on Earth.
All the things that human beings suffer from are how their environment treats them, and how the elements of their planet affects their mind and body - like radiation, cancer, and all.
The fact that you are even here, alive, on this planet is a mathematical miracle, and you should not spend the time that you have being busy being miserable.
In the long term, it is desirable that the human race, faced with the prospect of extinction on Earth, should prepare an escape route for itself to another inhabitable planet.
L.A. is so big that if you don't actually live in Hollywood, you might as well be from a different planet.
I believe in just enriching the economy. And we're leaving so much on the table, 72 percent of the planet.
The sense of alienation that inspires wonder, awe and fear in us is enough of a proof that life does not belong to the planet Earth.
Photosynthetic organisms in the sea yield most of the oxygen in the atmosphere, take up and store vast amounts of carbon dioxide, shape planetary chemistry, and hold the planet steady.
We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.
We are in danger of destroying ourselves by our greed and stupidity. We cannot remain looking inwards at ourselves on a small and increasingly polluted and overcrowded planet.
It is difficult to imagine evolution in alien planets operating in any manner other than Darwinian.
There is no point trying to figure out who is guilty or not at un-balancing the planet. I think we need to figure out and solve the problems together and not isolate from each other.
Earth Day should encourage us to reflect on what we are doing to make our planet a more sustainable and livable place.
The world is full of things that upset people. But most of us deal with it and move on and don't try and burn the planet down.
We are safer if there are not nuclear arsenals around the planet that can be utilized, stolen, sold to terrorists and others who would do harm.
I discovered that close to half the planet is 'pristine.' We live in towns such as London, Paris or Sao Paulo and have the impression that all the pristine areas are gone, but they are not.
If we could do away with traffic accidents, that'd be wonderful. There'd be more than a million people saved every year on this planet.
A friend of mine once sent me a post card with a picture of the entire planet Earth taken from space. On the back it said, 'Wish you were here.
I get the feeling humanity would be thrilled to discover life on another planet. So why not rediscover it here and really cherish it.
We both can be the most beautiful and benevolent creatures on the planet, but then there's another side that can be as harsh and as ugly as the darkest thing you could imagine seeing.
It was a different planet in 1967, the Broadway theatre. It had a little ashtray clamped to the back of every seat and the author got 10% of the gross.
