Speciation
- 10.08.2008
- Article Number: 4
| The definition of a species might seem cut and dried, but it’s not… in nature, there are lots of places where it is difficult to apply this definition.
Many species from the smallest organism’s to large mammals breed in ways that suggest some sort of evolution over time. There are species that breed within their own species and we have examples out there of species that breed outside of this. Over long periods of time they change in response to this breeding.
So, things change in a different way than where it started.
Can you add what you think is missing here? Please do?
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Evolution... Do you agree?
- 10.08.2008
- Article Number: 3
| The main idea or basis of Evolution is that all life on Earth shares a common ancestor, just as you and your cousins share a common grandmother or grandfather.
Through the process of descent with modification, the common ancestor of life on Earth, would have started out with what we have seen in fossils of record and what we see around us today. Evolution means that we're all distant cousins… humans and trees, birds and whales. Insects and dinosaurs., etc.
Do you agree with this? Most people have their own theory… what is your theory? Can you share it with us? How did it all happen?
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Evolution
- 08.21.2008 - Article Number: 2
| Human evolution, or anthropogenesis, is the part of biological evolution concerning the emergence of Homo sapiens as a distinct species from other hominans, great apes and placental mammals. It is the subject of a broad scientific inquiry that seeks to understand and describe how this change occurred. The study of human evolution encompasses many scientific disciplines, most notably physical anthropology, linguistics and genetics.
The term "human", in the context of human evolution, refers to the genus Homo, but studies of human evolution usually include other hominins, such as the australopithecines. The Homo genus diverged from the australopithecines about 2 million years ago in Africa. Several typological species of Homo, now extinct, evolved. These include Homo erectus, which inhabited Asia, and Homo neanderthalensis, which inhabited Europe.
Archaic Homo sapiens evolved between 400,000 and 250,000 years ago. Many scientists favor the view that H. sapiens evolved in Africa and spread across the globe, replacing populations of H. erectus and H. neanderthalensis. Others view modern humans as having evolved as a single, widespread population from existing Homo species, particularly H. erectus. The fossil evidence so far is insufficient to resolve this vigorous debate.
Starting with H. habilis, humans began using stone tools of increasing sophistication. About 50,000 years ago, human technology and culture began to change more rapidly. |
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Evolution Hype
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