It IS Rocket Science

Check out this incredible visualization of what is happening inside a rocket being launched into space.  The rocket engines are shown translucent so you can see what is going on.

From left to right, these are the  Saturn V, Space Shuttle, Falcon Heavy and the Space Launch System (SLS) rockets.  Red = kerosene RP1, Orange = liquid hydrogen and Blue = liquid oxygen

Brilliant video by Hazegrayart