How Many Grams of Uranium Could Destroy the World? 💥🌍

Описание: When the atomic bomb “Little Boy” struck Hiroshima it carried about 64 kg of enriched uranium‑235 — yet the amount that actually underwent fission was astonishingly small (around the mass of a paperclip). That single tiny fraction erased a city in seconds.
So could a few grams ever threaten the entire planet?