The evolution of human skin color essay

Before the scientific era, people often made up imaginative stories to explain what they saw in the world.

The evolution of human skin color essay

Our eyes tell us that the Earth is flat, that the sun revolves around the Earth, and that we humans are not animals.

But we now ignore that evidence of our senses. We have learned that our planet is in fact round and revolves around the sun, and that humans are slightly modified chimpanzees.

The reality of human races is another commonsense "truth" destined to follow the flat Earth into oblivion. The commonsense view of races goes somewhat as follows.

acquired trait: A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation (for example, the large. All of which is to say: The 3,year-old tilde might want to consider rebranding itself as Invisible Man With Twirled Mustache. I t’s easy to dismiss emoji. They are, at first glance, ridiculous. We’re asking for your help. For over 20 years, the webkandii.comcs website has provided engaging, multimedia educational materials at no cost. webkandii.comcs is one of the most-used science websites. Tens of millions of visitors come to our site each year to find the science and health information.

All native Swedes differ from all native Nigerians in appearance: Swedes have lighter skin than Nigerians do. They also generally have blond or light brown hair, while Nigerians have very dark hair.

Nigerians usually have more tightly coiled hair than Swedes do, dark eyes as opposed to eyes that are blue or gray, and fuller lips and broader noses. In addition, other Europeans look much more like Swedes than like Nigerians, while other peoples of sub-Saharan Africa--except perhaps the Khoisan peoples of southern Africa--look much more like Nigerians than like Swedes.

Yes, skin color does get darker in Europe toward the Mediterranean, but it is still lighter than the skin of sub-Saharan Africans. In Europe, very dark or curly hair becomes more common outside Scandinavia, but European hair is still not as tightly coiled as in Africa.

Since it's easy then to distinguish almost any native European from any native sub-Saharan African, we recognize Europeans and sub-Saharan Africans as distinct races, which we name for their skin colors: What could be more objective?

As it turns out, this seemingly unassailable reasoning is not objective. There are many different, equally valid procedures for defining races, and those different procedures yield very different classifications. One such procedure would group Italians and Greeks with most African blacks.

Another equally valid procedure would place Swedes with Fulani a Nigerian "black" group and not with Italians, who would again be grouped with most other African blacks. Still another procedure would keep Swedes and Italians separate from all African blacks but would throw the Swedes and Italians into the same race as New Guineans and American Indians.

Scientific racism - Wikipedia

Faced with such differing classifications, many anthropologists today conclude that one cannot recognize any human races at all. If we were just arguing about races of nonhuman animals, essentially the same uncertainties of classification would arise. But the debates would remain polite and would never attract attention outside the halls of academia.

Classification of humans is different "only" in that it shapes our views of other peoples, fosters our subconscious differentiation between "us" and "them," and is invoked to justify political and socioeconomic discrimination. On this basis, many anthropologists therefore argue that even if one could classify humans into races, one should not.

To understand how such uncertainties in classification arise, let's steer clear of humans for a moment and instead focus on warblers and lions, about which we can easily remain dispassionate. Biologists begin by classifying living creatures into species.

A species is a group of populations whose individual members would, if given the opportunity, interbreed with individuals of other populations of that group.

But they would not interbreed with individuals of other species that are similarly defined. Thus all human populations, no matter how different they look, belong to the same species because they do interbreed and have interbred whenever they have encountered each other.

Gorillas and humans, however, belong to two different species because--to the best of our knowledge--they have never interbred despite their coexisting in close proximity for millions of years.Why is there something rather than nothing?Might the world be an illusion or dream?What exists beyond the human senses?What happens after death?Does divine or supernatural agency exist?

Is the future already decided?; What is the meaning of life?What is right and wrong?Is the world good or bad?Are humans good or evil?What beings should have what rights?

PLOS Biology provides an Open Access platform to showcase your best research and commentary across all areas of biological science.. Submit Now. acquired trait: A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation (for example, the large.

Copies of the book Feathers: The Evolution of a Natural Miracle, ideally one per student.

Human Aliens - TV Tropes

Bag of craft feathers 15 objects or photos/photo copies (See the suggestions by chapter number on the Teacher Assessment Sheet.) In the 15 chapters of Feathers, Hanson details a sweeping natural history of.

The table below presents an abbreviated geologic time scale, with times and events germane to this essay. Please refer to a complete geologic time scale when this one seems inadequate.

The evolution of human skin color essay

acquired trait: A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation (for example, the large.

Human - Wikipedia