Khan Academy Static

Geologists and archaeologists will tell you how old things are or when they happened, but how do they know? This tutorial answers this question by covering some of the primary techniques of "dating" (not in the romantic sense).

10705_Carbon_14_dating_1.html

10708_K_Ar_dating_calculation.html

10707_Potassium_argon_K_Ar_dating.html

10706_Carbon_14_dating_2.html

10704_Chronometric_revolution.html