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		<title>Where Is Calcium Found?</title>
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		<pubDate>Sun, 07 Feb 2010 22:25:04 +0000</pubDate>
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				<category><![CDATA[Science]]></category>
		<category><![CDATA[alkaline earth metals]]></category>
		<category><![CDATA[calcite]]></category>
		<category><![CDATA[Calcium]]></category>
		<category><![CDATA[chalk]]></category>
		<category><![CDATA[dolomite]]></category>
		<category><![CDATA[gypsum]]></category>
		<category><![CDATA[limestone]]></category>
		<category><![CDATA[rocks]]></category>
		<category><![CDATA[seashells]]></category>

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		<description><![CDATA[Calcium (symbol Ca) is a chemical element that belongs to a group of alkaline earth metals. It doesn’t exist in a free state in nature so it must be obtained through certain chemical processes. In nature it can be found in rocks, chalk, limestone, dolomite, calcite, gypsum, seashells… Its importance for living beings is huge. [...]]]></description>
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