Just as motion sickness plagues passengers on boats and planes on Earth, it can also sneak up on astronauts flying into space and spending time on the International Space Station. However, before 1985, astronauts simply called it motion sickness like all of us.
All this changed when Senator Jake Garn escorted the STS-51
Johnson Stevenson's Oral History Project interview explained how yarn became a unit of measurement:
Jake Garn was ill, quite ill. I do not know if we should tell such stories. But still, Jake Garn, he made a mark in the Astronaut Corps because he's the maximum space sickness anyone can ever reach, so the sign of being completely ill and totally incompetent is a thread. Most guys may get a tenth of a yarn when that's so high. And he'll be remembered forever within the Astronaut Corps.
So, the next time you feel sick or upset on a cruise on a small car, you can say thank you that you only have a fraction of yarn feeling no better.
Courtesy of NASA.