The video explores the possibility of two people repopulating the planet if humanity were to become almost extinct. The host, Ivan Lima, discusses the dangers of inbreeding and how it would lead to a decrease in reproductive quality, resulting in serious health problems for the offspring. He cites examples of royal families who practiced inbreeding, such as the Habsburg dynasty and the Egyptian pharaohs, and how it led to genetic disorders and infertility. Lima also mentions a NASA study that suggests a minimum of 160 people with diverse genetic origins would be needed to colonize a planet without inbreeding problems. Ultimately, he concludes that while it is theoretically possible for two people to repopulate the planet, it would be extremely challenging and would likely lead to many genetic problems.
Here are the key facts extracted from the text:
1. According to a study in Czechoslovakia between 1933 and 1970, around 40% of children with first-degree relative parents had serious disabilities.
2. 14% of children with first-degree relative parents died in infancy.
3. Humans have two copies of all their genes, one from each parent.
4. Recessive genetic variations can be hidden when paired with a dominant gene, but can become apparent when paired with another recessive gene.
5. The Habsburg dynasty in Spain promoted many marriages within the family, resulting in a high incidence of mental and physical disabilities.
6. King Charles II of Spain was the product of a long history of inbreeding and suffered from numerous health problems.
7. The royal family of Hawaii also practiced inbreeding, with Princess Emma marrying her brother.
8. The practice of inbreeding was also common in ancient Egypt, with the parents of Tutankhamun allegedly committing incest.
9. A study of Tutankhamun's mummy revealed that he suffered from numerous health problems, including crooked teeth, temporal lobe epilepsy, and a foot problem.
10. The New Zealand kakapo parrot is a species that is affected by inbreeding, with a significant decrease in sperm quality.
11. According to a NASA study, a minimum of 160 people would be needed to colonize a planet like Mars without having problems with inbreeding.
12. These 160 people would need to be isolated for 200 years to allow for genetic variation to occur.
13. It would be possible for two people to repopulate the planet, but there would be a very small genetic variety and many problems would arise due to consanguinity.