By: Melissa Freeman
Evolutionary ProcessesRosemary and Peter Grant, along with their colleagues, conducted a study in the Galapagos Islands on finches. During this study, something incredible happened that demonstrates a modern day example of evolution through natural selection. The finches beaks had evolved so that each species had...
By: Munin
Evolution is the way in which groups of organisms change over time, usually in response to changes in their environment. The way in which this change is carried out is by a process known as "natural selection," where those organisms that are best able...
By: Bran Herbert
Projectile points served both a utilitarian and ritual purpose that determined not only their morphology but their manufacture, raw-material composition, and maintenance as well. Heavily used projectiles made out of a rare and valued but durable raw-material would be expected to be reworked more frequently...
By: Billy B. Bob
The Neanderthal DebateMass extinctions are more common than many realize. In fact, the scientific community has discovered evidence of five such extinctions throughout the 3.6 billion year history of life on this planet. Some speculate there may have been many more. In addition to...
By: Reno Wolfe
There should be no such thing as a "debate" concerning the Neanderthals. Many consider them to be direct ancestors of Homo sapiens. Others think they are completely separate, having no connection whatsoever with modern man. If the Neanderthal was not, or played a part in...
By: Jane Smith - 210665
I'm not a scientist, but have found myself thinking about the mechanism of evolution lately. I've been thinking about different strands of information that get reported in popular publications, about viruses, about mechanisms that switch genes on and off, and about cane toads. Cane toads...
By: B.J.
Nearly 150 years after its first publication (1859) Charles Darwin's On the Origin of Species is still one of the most hotly contested scientific works of all time. No other groundbreaking scientific theory has experienced such a prolonged backlash as Darwinian evolution. Germ theory revolutionized...
By: Randy Crum
Biological evolution has really the same definition as any other type of evolution. It merely means change over time. In biological terms it means change in the genetic characteristics of a population of organisms over time. Note the phrase "population of organisms". Individual organisms don't...
By: River Addington
As with many early ages, the Iron Age was named after the material that their modern tools were made of. Thus in the Iron Age the peoples used iron, as opposed to the Stone Age and Bronze Age. The Iron Age was the last of...
By: River Addington
America was a continent, undivided by political borders containing a great variety of different climates and cultures. In the north there were very harsh climates, reaching subzero temperatures. Into North America were a great variety of forests and deserts. Into Central America there were rain-forests...

 

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