Georgina RannardClimate and science reporterKate Stephens and Tony JolliffeBBC climate and science teamTony Jolliffe/BBC NewsThe specks of dust must be kept free from contamination on EarthThe first samples of ...

Chris BaraniukTechnology ReporterSierra SpaceSierra Space is working on a device designed to produce oxygen in moon-like conditionsInside a giant sphere, the engineers pored over their equipment. Before them stood ...