Changes

This was later revised to 40,000 years.

This was later revised to 40,000 years.

Another scientist later used other methods to derive a date of 62,000 years.

Another scientist later used other methods to derive a date of 62,000 years.

The original discoverer, unconvinced by this result, used a different method again, and came up once more with a date of 40,000 years.

The original discoverer, unconvinced by this result, used a different method again, and again came up with a date of 40,000 years.

However, such disagreements are not restricted to radiometric dating and occur in all fields of science.

 

The fallibility of dating methods is also illustrated by the fact that dating laboratories are known to improve the likelihood of of getting a "correct" date by asking for the expected date of the item.

For example, the Sample Record Sheet for the University of Waikato Radiocarbon Dating Laboratory asks for the estimated age, the basis for the estimate, and the maximum and minimum acceptable ages.<ref>[http://www.radiocarbondating.com/submission%20form%202003.pdf University of Waikato Radiocarbon Dating Laboratory Sample Record Sheet]</ref>

==Some major methods of radiometric dating==

==Some major methods of radiometric dating==

{{reflist|2}}

{{reflist|2}}

[[Category:Earth Sciences]]

[[Category:Earth Sciences]]