Unmanned deep space exploration depends on this stuff and we are almost out… jlolds deep space, Plutonium, space exploration September 19, 2013 1 Minute Plutonium 238, story in Wired, here. It’s a very big deal for science. Share this:TwitterFacebookLike this:Like Loading... Published by jlolds Native Angeleno, professor of Neuroscience and Public Policy at George Mason University View all posts by jlolds Published September 19, 2013