"Yes. The six astronauts returned to earth and had many children, and began a lineage over the past 3700 years. They got incredibly lucky with genetic mutations in that most of the people are relatively healthy. What kept the population down were the conditions. They didn't have much by way of scientific knowledge, and were a hunter/gatherer society, meaning that food scarcity and famine, as well as illness were major problems. The village I came upon on the mainland had about a hundred members. The others were on a satellite island. The mainland village came from there, they'd migrated over a couple hundred years before." Senku continued to explain because biology was genuinely interesting to him.

"No, not at all." He explained. "I suspect we cannot change the future. We could, in theory, pull people from the time before they died to the future though. Same with the AI that died in South America. The math says it shouldn't be a problem because if they just die there's no likelihood we're messing with something that would interfere with their past selves. I intended on saving 7.8 billion people, and I meant that." Senku responded, even though that might come outside of his lifetime. It wouldn't matter. He'd have contributed.