Human evolution did not occur directly from apes but rather from a common ancestor we shared approximately 6 million years ago. While we share over 90% of our DNA with chimpanzees and gorillas, they are actually distant cousins rather than direct ancestors. Additionally, less than half of the human body, about 43%, is made up of human cells - the rest consists of bacteria, viruses and fungi that make up the microbiome. Although Darwin popularized the theory of evolution, some of his ideas about differences between racial groups and intelligence have been disproven.