Everything is a working theory.

In 1961 Edward Lorenz retyped a number from a printout — 0.506 instead of 0.506127 — and his simulated weather forgot itself entirely. The butterfly effect, explained simply, with three simulations you can run yourself, real stories from Sarajevo to Slack — and one uncomfortable fact: reading this is already changing your future.

Your mind would often rather rewrite what you believe than admit you did something that doesn't fit. The cheapest exit wins.

Mitochondrial Eve isn't the first woman or the only one of her time. She's a shadow cast by who's alive to count — and she keeps moving.