The U.S. is set to send hydrogen to space using the RL10E-1 rocket engine. This innovation combines 3D printing and hydrogen ...

Ariane 6, a hydrogen-powered rocket, promises sustainable space travel with modular versatility and cutting-edge propulsion ...

Despite its age, it never went away. Born into this world as America's first liquid hydrogen rocket engine, it was continuously improved, and it will continue to be so for many years to come.