A book about how mankind discovers 2 or 3 bodies (can't remember exactly). The bodies are discovered in the south pole.

[SandyF90]

We manage to wake up one of the bodies found, they are tested and are positive for human DNA. The first person that wakes up starts telling the story, our story how we were once an advance race with every problem we now face solved, second person wakes up and also start telling the story they are or were a couple (woman and a man) they were in love. But then something happens, and we destroy ourselves...in that era, so basically us humans as we know ourselves existed millennia ago in this very same planet.

This is pretty much the main concept I remember the book was about. I believe the book title is:

The History before time.

But I'm translating from a Spanish title so it might not be accurate.

 

[otistdog]

Could this be René Barjavel's La Nuit des Temps (1968)? According to ISFDB, it was translated into Spanish in 1969 under the title La noche de los tiempos.

The Wikipedia article's summary sounds fairly similar to your description of the plot:

When a French expedition in Antarctica reveals the ruins of a 900,000-year-old civilization, scientists from all over the world flock to the site to help explore and understand. The entire planet watches via global satellite television, mesmerized, as the explorers uncover a chamber in which a man and a woman have been in suspended animation since, as the French title suggests, "the night of time". The woman, Éléa, is awakened, and through a translating machine she tells the story of her world, herself and her man Païkan, and how war destroyed her civilization. She also hints at an incredibly advanced knowledge that her still-dormant companion possesses (a scientist, Coban, whom she hates for having separated her from her lover Païkan), knowledge that could give energy and food to all humans at no cost. But the superpowers of the world are not ready to let Éléa's secrets spread, and show that, 900,000 years and an apocalypse later, mankind has not grown up and is ready to make the same mistakes again.