>>Holocene megafauna extinction is a mystery I would like to try to unravel. The best hypothesis i have heard is a massive solar flare
Google “Richard firestone” with “Younger Dryas Event”
Firestone-West supernova hypothesis does not explain the existence of more than a dozen beryllium-10 peaks seen in the polar ice record, eight of which precede the proposed supernova date. The supernova hypothesis likewise does not appear to match the more gradual rate of megafauna extinction than would be explained by a single supernova event.