We don't always get to pinpoint the exact moment the world changes. But when the New Mexico dawn was torn open at 5:29 am on 16 July 1945, it was, without a doubt, a pivotal moment in humanity's history. That was the United States Army's Trinity test: the detonation of a plutonium implosion device known as the Gadget – the world's very first test of a nuclear bomb. And more than 80 years later, scientists are still finding the changes it wrought. Now, in a mineral forged in the fury of the