I was just watching Titanic and spent 20 minutes looking up the effects of hypothermia and discovering that Jack may have been alive and in stage 3 hypothermia when Rose let go, and because he sank instead of floated, he was in fact alive. It was a fun little time sink. What rabbit holes have you done down recently?
Learning about Space. There we’re working miniature prototypes of a ship to get humans up to 12% of Speed of Light. Project Orion worked by blasting nuclear bombs behind a ram jets once per second.
Relevant XKCD:
https://xkcd.com/2423/
All of the humans or just parts of them?