Teacher:You are given a sentence in Spanish. Your job is to translate the Spanish sentence into Japanese.
Teacher: Now, understand the problem? Solve this instance: Volvemos al registro fósil y podríamos tratar de detectar cuántas han ocurrido en el pasado.
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
化石をさらに調査して過去にそのような出来事が何回あったか研究しています