Dan talks briefly about his favorite pen.
Sources
Histories
https://history.nasa.gov/spacepen.html
http://www.historyofpencils.com/writing-instruments-history/history-of-space-pens/
http://www.spaceflownartifacts.com/flown_writing_instruments.html
https://www.spacepen.com/about-us.aspx
Misconception about NASA’s spending
https://pjmedia.com/eddriscoll/2014/9/16/degrasse-tyson-space-pen/
How Ballpoint Pens work
https://www.youtube.com/watch?v=RrPlOM5MTSM
http://www.historyofpencils.com/writing-instruments-inventors/l%C3%A1szl%C3%B3-b%C3%ADr%C3%B3/
Get One For Yourself!