Bernard Marks on Nostr: Evolution, especially human, is often a very complicated web rather than any clear ...

Evolution, especially human, is often a very complicated web rather than any clear line. Typically, different populations the more distantly evolved and longer isolated have the most difficulty producing offspring, fertile offspring, and healthy offspring. Apes from different continents have not produced offspring. Apes of different species from the same continent can sometimes produce offspring, but they may not be fertile and usually have many problems.

Because species or races of humans and hominids are more mobile and have not been as isolated from each other, a massive amount of hybridization has been attempted, but most resulting in failure. The closer the inbreeding, the more certain of healthy and similar offspring.