From known data, I don't believe your hypothesis is likely to be correct: 1) 13.8 - Age of Universe (Billion years) 2) 4.5 - Age of Earth 3) 3.5 - (mini

From known data, I don't believe your hypothesis is likely to be correct: 1) 13.8 - Age of Universe (Billion years) 2) 4.5 - Age of Earth 3) 3.5 - (minimum) Age of life on Earth Our ancestors have already been alive here for at least 25% of the duration of the universe. To me, the most fascinating number is the small gap between 2) and 3). Suggesting that life here, at least, was almost inevitable. Whether through panspermia or ab initio, it appears difficult neither for life to get started nor to keep hanging around. I read last year about a hypothesis that iirc 100,000 years after the big bang, as the entire Universe was cooling, for some duration it was lukewarm in patches all over. Ideal for the first iteration of life and perhaps for an initial panspermia event that seeded all parts of the expanding universe.