by Margo Pierce
NASA’s Spinoff Publication

Anyone who has gotten a sofa stuck in a doorway on moving day knows how frustrating it is when there’s no other way in or out. The doorways on the International Space Station, or airlocks, have worked just fine for 20 years. But as more researchers and companies wish to expand the scope and size of the projects they send into low-Earth orbit, a larger doorway could help.