TIL Thermonuclear bombs are mostly styrofoam. The radiation channel is filled with polystyrene foam, a crucial component for the device's function, making up the bulk of its volume

https://en.wikipedia.org/wiki/Thermonuclear_weapon
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1g8qz3k/til_thermonuclear_bombs_are_mostly_styrofoam_the/