content: This is nonsense http://www.snopes.com/business/genius/spacepen.asp Anyone who wonders about the viability of a "space pen" should try and use one. Specifically the original chrome AG7 Fisher space pen. You will never go back to another ballpoint. Basically, the pen cartridge is pressurized, so you can write upside-down, even under water. The chrome pen case has the easiest-to-use clicking mechanism. It is a real pen for the 21st century, and writing in cursive is just as simple and effortless.