Featured in plutonium-238

Plutonium-238 Is Produced In America For The First Time In Almost 30 Years
NASA Can Make 3 More Nuclear Batteries, And That’s It
NASA Resumes Production Of Plutonium-238 Space Fuel After 25 Years
Running Short on Fuel, Europeans Turn to Smoke-Detector Tech for Deep-Space Power
Plutonium Shortage Threatens Future Deep Space Missions