La planète des singes

THE THREETH SYRETY TEXTS Are there human beings outside our galaxy? This is the question that Professor Antelle, Arthur Levan, his second, and journalist Ulysse Mérou, when they observe the landscape of a planet near Betelgeuse from their spaceship: cities, roads strangely similar to those of our Earth are seen. After they have landed there, the three men discover that the planet is inhabited by monkeys, who take advantage of Ulysse Mérou and experiment with him. The journalist must prove his humanity before the monkeys.