Les vents du temps

They were visitors from outer space who'd come to Earth around 13,000 BCE to find only primitive cultures. They go into deep sleep while humanity matures. They resemble us & can both breathe the air & eat our food. Wes Chase discovers them while on a casual fishing trip. It was a long time before they were able to explain to him why they were on Earth or what they needed. They claim they're here to learn but their power makes it difficult to say what their real motives are. It was even longer before he conquered his horror & decided he could help them in their mission to bring peace to the universe. When he finally found the daring answer to their problems, he realized that he would have to leave his own life behind & go with them into the future & the winds of time.