Short answers, pulled from the story.
German chemist Martin Heinrich Klaproth discovered uranium in 1789 while working inside his experimental laboratory in Berlin. He named the element Uranit after the planet Uranus which William Herschel had discovered eight years earlier.
Scientists led by Enrico Fermi initiated the first artificial self-sustained nuclear chain reaction on the 2nd of December 1942 at the University of Chicago. This experiment utilized 360 tonnes of graphite and 53 tonnes of uranium oxide piled beneath Stagg Field.
Kazakhstan mined 23,270 tonnes representing 39% of the total global production of 60,213 tonnes in 2024. Canada followed as the second largest producer with 14,309 tonnes before Namibia supplied 7,333 tonnes.
Uranium miners face a higher incidence of cancer linked directly to their occupation including an excess risk of lung cancer among Navajo uranium miners. The Occupational Safety and Health Administration set workplace limits at 0.25 mg per cubic meter over an eight-hour day while concentrations reaching 10 mg per cubic meter become immediately dangerous to life and health.