Atomic Energy’s death spiral has spawned a run to green power. But the toxic mineral lithium has become a critical ...

Beginning in the late 1950s, the U.S. met this challenge by developing nuclear batteries known as radioisotope thermoelectric generators (RTGs) and producing plutonium-238 (Pu-238) as their fuel, ...

Also keep an eye out for red crystals on the ground; this is Plutonium, and you can never have enough of the stuff. Heridium is a little harder to find. It's a mineral deposit that often appears ...