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Fossils are amongst the most fascinating and mysterious phenomena on [url=http://www.ilyav.com/uggpascher.php]ugg pas cher[/url] earth. Explanations about the origins of fossils have been offered since the early 11th century and many theories about fossils exist today. Here's a snapshot of the basics of fossils.
What Are Fossils?
Fossils are impressions or remnants of animals and plants that lived on Earth thousands of [url=http://www.mxitcms.com/abercrombie/]abercrombie milano[/url] years ago. These remains can be parts of animals such as bones, teeth, hair, skin, [url=http://www.1855sacramento.com/woolrich.php]woolrich[/url] shells and feather, parts of plants such as leaves and roots, and things made by animals such as footprints and even excreta! In order to [url=http://www.thehygienerevolution.com/barbour.php]barbour paris[/url] be considered a 'fossil' a [url=http://www.achbanker.com/homes.php]www.achbanker.com/homes.php[/url] plant or animal remain needs to be at least 10,000 years old!
How Are Fossils Formed?
Fossil formation is somewhat of a miracle. When animals and plants die, their bodies are decomposed rather quickly back into the earth by bacteria or are consumed by scavengers. So, it takes an incredible amount of luck for the remains of a plant or animal to be preserved by nature into a fossil. Fossils can be formed in many ways.
Internment: Remains of animals and plants need to be quickly buried in the soil. More and more soil deposits compress the remains to a point that hard body parts (bones, teeth) become encased by soil. Bones and teeth start decaying and mineralised water creeps into them, replacing the chemicals with soil minerals. After thousands of years, this process results in a rock-like copy of the animal or plant, called a fossil!
Refrigeration: Plants [url=http://www.mquin.com/giuseppezanotti.php‎]giuseppe zanotti soldes[/url] and animals can be [url=http://23193.com/read.php?tid=10661]nike air jordan pas cher Choosing a Color Scheme for Bathroom Decor[/url] frozen [url=http://www.rtnagel.com/louboutin.php]louboutin[/url] in permafrost and become fossilized over millions of years.
Replacement: Cell walls of dead animals and plants can be dissolved over time and then replaced by minerals.
Are Fossils Rare?
Millions of fossils have been discovered all over the world, which can lead you to believe that [url=http://www.mxitcms.com/abercrombie/]abercrombie[/url] fossils are pretty common. [url=http://www.rtnagel.com/airjordan.php]nike air jordan pas cher[/url] However, billions of creatures have lived [url=http://www.mxitcms.com/tiffany/]tiffany outlet[/url] on planet Earth in the past 550 million years of animal life, and only a very small percentage of these creatures are eventually turned into fossils. Thus, fossils are extremely rare, contrary to popular belief.
Are Fossils Traded or Collected?
Yes, many people collect fossils [url=http://www.njbed.cn/read.php?tid=64100&ds=1]barbour South America Trip Planning[/url] as a hobby or simply for their incredible scientific significance. Amateur fossil collectors also engage in the buying and selling of fossils through fossil clubs and even online fossil sale websites. However, whether you want to buy or sell fossils or collect them, you will most likely have to abide by several rules and legal requirements.
Fossils have fascinated people for hundreds [url=http://www.jjhuabao.com/guestbook.asp]tiffany ou[/url] of years, especially those who are interested in the nature and origin of our planet. It is a cool interest to have, and a great [url=http://www.rtnagel.com/louboutin.php]louboutin pas cher[/url] conversation starter too!
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