A Quote by Seth Shostak
Consider: Life arose on Earth close to four billion years ago. Four billion years of slithering, swimming, and soaring life forms. But only in the last 200 thousand years has a species arisen that can fathom the laws of nature and build hardware able to signal its presence.
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If we could magically transport ourselves back to the young Earth, when it was only a billion years old or two billion years old or three billion years old or four billion years old, we wouldn't be able to survive. We would have a hard time surviving if we were transported to the time when dinosaurs were around.
Our planet has been around only for four and a half billion years. Let's imagine a planet that has life on it such as life is on Earth and it's seven billion years old. Let's say that planet evolved intelligence. Well, that intelligence would be way more advanced than what we call intelligence here on Earth. How long has intelligence been around on Earth as we've come to define it?
It is only myth that attempts to say how the universe came to be, either four thousand or twenty billion years ago.
There is nothing wrong with the planet. The planet is fine ... been here 4 1/2 billion years. We've been here, what, a 100,000 years, maybe 200,000. And we've only been engaged in heavy industry a little over 200 years. 200 years versus 4 1/2 billion. And we have the conceit to think that somehow we're a threat? The planet isn't going away. We are.
Life existed on Earth for nearly four billion years before anything remotely resembling a human being showed up. And even then, when we started to branch off from other apes about 10,000,000 years ago, our ancestors looked pretty different.
All indications are that three and a half billion years ago, Mars looked like Earth. It had lakes. It had rivers. It had river deltas. It had snow-capped peaks and puffy clouds and blue sky. Three and a half billion years ago, it was a happening place. The same time on Earth, that's when life started. So did life start on Mars?
The planet earth has a life span of eight billion years, give or take a few million. People have been around for approximately forty thousand years-a virtual blink in the cosmos. It is sad that we as a species are ravaging the natural world so fast that we are jeopardizing our survival. If we wipe ourselves out, it would be the height of folly, but the earth will survive even us. It will eventually restore itself. It might take a few thousand years, and it won't be just as it was before, but its life is stronger than death.
Humans are remarkable: the first species in almost four billion years of life on earth that dominates the biosphere. This gives us the power, in principle, to build societies in which everyone flourishes. But it also creates great dangers because it is not clear that we really understand how to use our potentially devastating powers.
Four billion years ago the planet Earth was molten rock; now it sings opera!
When I was a child, the Earth was said to be two billion years old. Now scientists say it's four and a half billion. So that makes me two and a half billion.
A billion homo sapiens are added every 11 years to the planet. The hypertrophy of a single species pushes other life-forms out of bed and into extinction. The decline of biological diversity is real and severe. The alarming loss of soil fertility, forest cover, and coral reef viability and the release of fossilized CO2 that nature put away 300 million years ago in its march toward greater diversity - all these "losses" and many others are the result of one life-form annihilating other life-forms in its immoral confusion of "dominion" with "domination."
This influential, yet controversial idea requires that the mixture of species on Earth at any moment acts as a collective organism that continuously (yet unwittingly) tunes Earth's atmospheric composition and climate to promote the presence of life... But I'd bet there are some dead Martians and Venusians who advanced the same theory about their own planets a billion years ago.
There is no rational reason to doubt that the universe has existed indefinitely, for an infinite time. It is only myth that attempts to say how the universe came to be, either four thousand or twenty billion years ago.
Life began three and a half billion years ago, necessarily about as simple as it could be, because life arose spontaneously from the organic compounds in the primeval oceans.
I tell my students, with a feeling of pride that I hope they will share, that the carbon, nitrogen, and oxygen that make up ninety-nine per cent of our living substance were cooked in the deep interiors of earlier generations of dying stars. Gathered up from the ends of the universe, over billions of years, eventually they came to form, in part, the substance of our sun, its planets, and ourselves. Three billion years ago, life arose upon the earth. It is the only life in the solar system.
The U.S. only has 20 billion barrels of oil in reserve. It seems as though there is no more oil around. Venezuela has 300 billion barrels of oil in reserves. Iraq has, like, 150 billion barrels of oil. Iran, close to 300 billion barrels of reserve. Oil for 200 years, of course.
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