Races of Space Aliens. Forbidden Anthropology

In the book, the author presents an astonishing hypothesis, according to which life originated beyond Earth and appeared on our planet immediately in a perfect form. According to the author, intelligent beings-colonizers from other stellar worlds have visited our planet multiple times and left their offspring in the form of ancient humans and intelligent arthropods. However, earthly conditions do not favor the long-term preservation of appearance and genome in their original form, and after some time, the community of intelligent beings changed, degraded, and turned into animals. This happened many times over long geological periods.
The animals that evolutionists mistakenly consider to be the ancestors of humans are actually degraded descendants of ancient humanity.
An unbiased reader of this book may form quite a different opinion about the nature of variability in modern humans. Neoanthropes (new people) appeared on Earth relatively recently. According to the author, the ancestors of modern people are also cosmic colonizers who visited our planet once again.