Changes
the 50,000 year mark
: If the C-14 decay rate varies proportionately with the age of the universe, and if that age is, say 5,000 years rather than 10 billion years, then obviously the C-14 decay rate could have been many orders of magnitude larger a thousand years ago.--[[User:Aschlafly|Aschlafly]] 13:51, 5 May 2007 (EDT)
== the 50,000 year mark ==
The sentence "For this reason, scientists do not generally attempt to carbon date material that is believed to be older than about 50,000-60,000 years old" is factually incorrect. After 50,000 years carbon-14 would have undergone over 8 half-lives and essentially there rate of change has reached a screeching halt. It is the result of both the small amout of carbon-14 and the length of the half-life that prevent dating back to 50,000 years. [[User:Sterile|Sterile]] 13:59, 5 May 2007 (EDT)
