How do you get your groceries delivered when you live on a space station? Later this year, it will be via the Cygnus unmanned spacecraft, developed by Orbital Sciences Corporation as part of NASA’s program to outsource operations to commercial companies. Once the new supplies are unloaded, Cygnus will be loaded up with the station’s trash and sent to burn up in the atmosphere, making it the world’s most expensive incinerator and further proving that everything which goes up must come down.