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His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.
The age of the fossil must be determined so it can be compared to other fossil species from the same time period.
It is naturally unstable and so it will spontaneously decay back into N-14 after a period of time.
Wiens has a Ph D in Physics, with a minor in Geology.Definitely the perfect 21st birthday song to play at your 21st birthday party!Now that you are ready to get HYPE on your Birthday, get yourself the right gear from Birthday Girl! Am a perfect gentleman, Ill open doors for you and stand when you approach or leave the table. "It is not in the stars to hold our destiny but in ourselves.