How Fallout from Nuke Tests Just Proved that Brain Cells Regenerate

Before the Limited Test Ban Treaty of 1963 barred all aboveground, subsea, and orbital nuclear weapons testing, the world's nations were popping off nukes like champagne bottles on New Years. Surprisingly, that sprinkling of high-energy particles was actually quite beneficial, to science at least, as it's just helped solve a longstanding dispute in human physiology--can the brain regrow neurons? Short answer: sorta.