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To understand this controversy, the anatomical, archaeological, and genetic evidence needs to be evaluated.
The replacement hypothesis suggests that the genes in fully modern humans all came out of Africa.
As these peoples migrated they replaced all other human populations with little or no interbreeding.
In fact, evolutionary concepts about life date far back into history and arose in many different cultures.
The Greeks developed a concept of evolution over 2,300 years ago that was basically equivalent to that of Charles Darwin's, but the early Christians opposed the idea and destroyed all of the works that promoted it or any other naturalistic explanations for earthly phenomena.
So either your Teachers and Professors are indeed liars, or they were very poorly educated.
There are two theories about the origin of modern humans: 1) they arose in one place—Africa—and 2) premodern humans migrated from Africa to become modern humans in other parts of the world.
The Theory of Biological Evolution is most often associated with Charles Darwin, because it was Charles Darwin that proposed the mechanism of natural selection and accompanied that proposition with a large volume of empirical data providing evidence for biological evolution.
Darwin was not, however, the first person to propose an evolutionary explanation for the diversity of life on earth.
Although it was known that homo sapiens had bred with Neanderthals after leaving Africa, a study has concluded that in doing so they picked up genes which protected them and eventually helped them to populate the planet.'Given the complexity of the African fossil record, which indicates that a variety of transitional human groups, with a mosaic of archaic and modern features, lived over an extensive geographic area from Morocco to South Africa between roughly 200,000 and 35,000 years ago, I favor a model that involves interspecies mating during the archaic-to-modern transition,' Professor Hammer wrote.