Variations, like different colors of skin, eye, flowers, differences in smell, size, taste, and so on, are due to random mutations in genes-a small stretch of DNA molecules. Artificial selection, an analogous phenomenon, is easier to comprehend it is the deliberate choice (selecting/picking) of certain variations by human intervention. The analogy is a powerful tool in pedagogy and to make his theory of natural selection unambiguously legible Darwin himself resorted to this. ” -Carl Sagan the entire living organisms that appeared only once in the origin of life, the so-called principle of common descent. Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light.
How frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds. What is interesting about this image is that the pale blue dot – that occupies not more than a single pixel on this deep space image- is nothing but the planet that we all live in the entire humanity pondering with contrasting goals of life, all other animals, plants and microbes, and all the inanimate objects! NASA took this photograph after the request from Carl Sagan- a well-known astronomer and writer, who made the following remark after seeing the image: “Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner. of my favorite image is a photograph called “pale blue dot” that NASA’s Voyager-1 spacecraft took 15 years ago at 6 billion kilometers away ( Fig.
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