They can take rocks within the caves, and they can slice them and look at the layers within with rocks, much like the rings of a tree, and they can count back in history and learn about the climate on our planet at very different times.
Uzmu kamenje iz špilja, presjeku ih i gledaju slojeve unutar  kamena, slično kao godovi kod drveta, i mogu izbrojati unazad u povijest i naučiti o klimi na našem planetu kroz različita doba.