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Humans are subject to the same forces of evolution as every other species that inhabits this planet.
Member rating: No Rating | Words: | Submitted: Mon Jun 19 2006
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Humans are subject to the same forces of evolution as every other species that inhabits this planet. Likewise, the traits that make humans unique have evolved in the context of making the human species more prolific. The intrigue of why humans have brains which are alometricaly one of the largest on the planet, possibly accounting for our intelligence, is also a result of some set of evolutionary pressures. When the brain sizes of ancestral humans are examined a patter of increases in brain size emerge. An accurate account of what forces shaped the evolution of larger brains should also fit this pattern. One such hypothesis is that the climatic shifts that occurred around 2.8 million years ago (Mya) caused the hominids present around that time to move to a more open habitat, thereby changing their ecological niche. This allowed for and started a chain reaction that selected for larger...
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