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.
It has a sliding multi-touch screen display with a physical QWERTY keyboard and powered by Black Berry’s latest operating system, OS 6.
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.
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