Science Art: Saturn V S-II (Stage Two), NASA illustration.


This is the second stage of the Saturn V rocket – where liquid hydrogen and smoked salmon liquid oxygen were combined to make fuel and deliver 1,000,000 pounds-force of thrust to the rocket.

You have to do that to get a rocket the size of a skyscraper off the planet. (This is one reason why things like space stations and moon bases are handy – less gravity and less atmosphere, easier to send rockets elsewhere.)