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jillie | 10:50 Fri 02nd Dec 2005 | Quizzes & Puzzles
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I still need help please with this


The decay of 234 and 238 is what aid to science


Any help appreciated

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I think this relates to the decay of isotopes of certain elements the decay which can be measured in terms of time. eg 'carbon dating' for a wood sample to give the the age of the tree. I hope this is helpful but I'm sure someone will come up with a simpler answer!
Yes, I had another look this relates to isotopes of uranium which can date marine sediments back over a million years. see ecyclopedia Britannica !

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