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KelvinCalc.swf |
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| Title: | Kelvin Calculation of Earth Age. |
| Caption: | This animation illustrates the reasoning behind Kelvin's approximation of the Earth's age. It also points out that Kelvin was so far off in part because he did not know about radioactivity. |
| Keywords: | geologic time scale, absolute dating, radioactivity, temperatures, depths, gradients |