Age dating of rocks relative dating lesson
When paleontologist Mary Schweitzer found soft tissue in a Tyrannosaurus rex fossil, her discovery raised an obvious question -- how the tissue could have survived so long?
The bone was 68 million years old, and conventional wisdom about fossilization is that all soft tissue, from blood to brains, decomposes.
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How do scientists know the bones are really 68 million years old?
Today's knowledge of fossil ages comes primarily from radiometric dating, also known as radioactive dating.
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The new design has not much comprised on its classic Blackberry profile, but comes with an excellent touch screen and featuring far greater social network integration, a powerful search feature, and a Web Kit browser comparable to Apples Safari.
Both Apple and Research in Motion (RIM) have introduced two amazing smart phones to the market in year 2010.