Dating 14 years
Research has been ongoing since the 1960s to determine what the proportion of in the atmosphere has been over the past fifty thousand years.
Like I told my daughter "i'm still waiting for the book i was suppose to get PARENTING 101 from the hospital " HA HA. Well I talked to my daughter and told her there will not be "DATING" until she's 16. The whole thing started with a movie, and then hanging out at each others houses while mom's were home, and our moms' were friends too.
I know that when a child asks her/his parents for permission to "date" it is not only about going out with the girl/boy, they are also asking, "do you trust me? I will not give you advice as I do not know your family, your values, nor do I understand your relationship with your daughter.
I know that the more parents try to keep their children young, the more their friends may pressure them to grow up. I know that you are in a position to open the communication for ALL her dating experiences.
The older a sample is, the less (the period of time after which half of a given sample will have decayed) is about 5,730 years, the oldest dates that can be reliably measured by this process date to around 50,000 years ago, although special preparation methods occasionally permit accurate analysis of older samples.
The idea behind radiocarbon dating is straightforward, but years of work were required to develop the technique to the point where accurate dates could be obtained.