A Quote by Ernst Mayr
A new species develops if a population which has become geographically isolated from its parental species acquires during this period of isolation characters which promote or guarantee reproductive isolation when the external barriers break down.
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A species consists of a group of populations which replace each other geographically or ecologically and of which the neighboring ones integrate or hybridise wherever they are in contact or which are potentially capable of doing so (with one or more of the populations) in those cases where contact is prevented by geographical or ecological barriers.
I don't think the isolation of the American writer is a tradition; it's more that, geographically, he just is isolated, unless he happens to live in New York City. But I don't suppose there's a small town around the country that doesn't have a writer.
The sooner we become a multi-planet species, the safer the species is, and the stronger the guarantee that we're going to continue to evolve.
Individuality is different than isolation. Isolation is trying to do everything on your own, living life by yourself. Isolation happens when you choose not to be involved in any communities, making sure you keep a safe distance from people in your life. I’m not recommending isolation. Science, psychology, and religion all suggest long term isolation is dangerous and unhealthy.
Man, who preys both on the vegetable and animal species, is himself a prey to neither. He too possesses the reproductive principle far beyond the degree requisite for the bare continuance of his species. What becomes of the surplus of human life to which this principle is competent?
Could it be that the atomic isolation of the husband and wife nucleus with an orbiting child or two is in fact a culturally imposed aberration for our species? As ill-suited to our evolved tendencies as corsets, chastity belts, and suits of armor? ...a distorted and distorting family structure inappropriate for our species?
A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.
There are many ways for organisms to probe the external world. Some smell it, others listen to it, many see it. Each species, therefore, lives in its own unique sensory world of which other species may be partially or totally unaware.
Trade barriers constitute isolation; isolation gives rise to hatred, hatred to war, and war to invasion.
I had found again and again that the most aberrant population of a species - often having reached species rank, and occasionally classified even as a separate genus - occurred at a peripheral location, indeed usually at the most isolated peripheral location.
Where do we say that a cell became a blade of grass, which became a starfish, which became a cat, which became a donkey, which became a human being? There's a real lack of evidence from change from actual species to a different type of species.
If new species arise very rapidly in small, peripherally isolated local populations, then the great expectation of insensibly graded fossil sequences is a chimera. A new species does not evolve in the area of its ancestors; it does not arise from the slow transformation of all its forbears.
co-author with Niles Eldridge
The various processes of belief acquisition which are native to a species include ones which may allow for the reliable pick-up of information, which, in turn, allows individual members of the species to successfully negotiate their environment and satisfy their various desires.
We are the most dangerous species of life on the planet, and every other species, even the earth itself, has cause to fear our power to exterminate. But we are also the only species which, when it chooses to do so, will go to great effort to save what it might destroy.
Researchers keep identifying new species, but they have no idea about the life cycle of a given species or its other hosts. They cut open an animal and find a new species. Where did it come from? What effect does it have on its host? What is its next host? They don't know and they don't have time to find out, because there are too many other species waiting to be discovered and described.
Zoologists have reckoned there are up to at least 750 species of animal that have been observed exhibiting same-sex behaviour, or gender role transformation (which is very common in a wide range of fauna). There is only one species on earth, however, which has exhibited homophobia or transphobia. And that is the species homo sapiens sapiens. Us. So let's not allow the foolish, ignorant or bigoted ever to use words like "natural."
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