This website lists the astronauts in space right now, with links to their Wikipedia entries. They’re all in the International Space Station and come from Russia, China, the United States, and the European Union. — MF

The best source I’ve found for small samples of very pure elements – such as scandium, dysprosium, holmium, terbium, yttrium, uranium – including, yes, cubes of pure tungsten ($14), is Luciteria. Very reliable, thorough, and extensive catalog of all available common and exotic elements. I’ve been amassing a full collection of these universal atoms. — KK