In space, metals can weld together without heat or melting.
Check out Audible: bit.ly/AudibleVe
Support Veritasium on Patreon: bit.ly/VePatreon
Written by Joh Howes and Derek Muller
Yes, it's pronounced Gemini (ee not eye) because that's the way everyone pronounced this mission.
Thanks to Patreon supporters:
Bryan Baker, Donal Botkin, Tony Fadell, Saeed Alghamdi
Gemini IV transcripts: www.jsc.nasa.gov/history/mission_trans/gemini4.htm
Gemini IV recordings:
archive.org/details/Gemini4 (relevant clip is 1297 at about 2:00)
ESA cold welding recommendations:
Cold welding gold nanowire:
Music by Kevin MacLeod "Intrepid" www.incompetech.com