Possible Clues:

• Archaeologist's measuring technique
• Archaeological age-determination process
• There's an element of romance to it?
• Being concerned about tie to a time, use this scientific technique
• Being concerned about link to a time, use this method?
• Process for determining age
• The use of isotopes to determine age
• Method for determining the age of old matter
• Age-measuring technique
• Means of finding age of prehistoric items