Changes

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 again came up 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.

==Some major methods of radiometric dating==

==Some major methods of radiometric dating==

{{reflist|2}}

{{reflist|2}}

[[Category:Earth Sciences]]

[[Category:Earth Sciences]]