Extras
Breakthrough: The Ideas That Changed the World
Jim Al-Khalili demonstrates why hydrogen is the ultimate rocket fuel.
The Ultimate Rocket Fuel
Breakthrough: The Ideas That Changed the World
Episode 5 Preview | The Rocket
Blast off into history to see how rockets originated not in the sky, but in a cave.
Episode 5 Preview | The Rocket
Breakthrough: The Ideas That Changed the World
Franklin Chang-Diaz demonstrates the energy required to launch a rocket into space.