miércoles, 3 de octubre de 2012

The Extinction


In biological terms, is considered as a phenomenon extinction completely natural result of a process in which a species originating from other-than-dies, which usually occurs in the span of several hundred thousand or several thousands of years. Those species disappeared also unable to adapt to the changes that occur in their habitat, which naturally pass and, in most cases, over long periods of time. Thus, two-thirds or more of the animal species that have existed on Earth are extinct. Unlike the extinctions that occurred in the past naturally, current happening at a rapid pace and are not due to a natural inability of species adaptation, or are the result of an evolutionary process, but due to the man activity takes place.

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