[Ernest_at_the_Beach]

Stable isotopes are good for establishing prehistoric diets.

I am uneducated in this knowlege....how is it possible ?

[Coyoteman]

Stable isotopes are good for establishing prehistoric diets.

I am uneducated in this knowlege....how is it possible ?

Quick answer: Stable isotopes can be determined for a variety of plant and animal foods. The raw numbers and ratios for C13 and N15 differ significantly among the various foods.

People who rely heavily on particular foods tend toward those stable isotope readings and ratios.

We can determine the readings from various analyses, and make good estimates of prehistoric diets.