The Truth About the Million-Dollar Space Pen

In the 1960s, NASA faced challenges writing in space, initially using pencils like the Soviets. However, pencils posed risks like flammability and debris. Paul C Fisher invented the AG7 Anti Gravity pen, which used a pressure ink cartridge and non-Newtonian fluid to write in microgravity. NASA adopted it in 1968, and it became a staple for astronauts and cosmonauts. Despite myths, the pen wasn't used in Apollo 11's emergency; a felt-tip marker was. The space pen remains a symbol of innovation.

Describe how the ink in the space pen is different from regular ink.

What incident involving the Apollo 11 astronauts illustrates the practical use of the space pen?