NASA's Common Extensible Cryogenic Engine, also known as CeCe, has reached new technological heights in cooling technology. Cooling, of course, allows an engine to run more efficiently and with a much lower chance of engine failure.
The engine is able to utilize liquid hydrogen and liquid oxygen, which creates a vapor. When the vapor exits from the burning oxygen and touches the rim of the cryogenic rim, it turns to ice.
This technology is the first of its kind to allow a space shuttle to run as high as 108 percent power, and lower its power all the way down to 8 percent. This will allow for smoother moon landings and allow more cargo on trips.