Forget everything you know about backup plans. The Apollo lunar module's ascent engine had none. If the engine didn’t light up, the crew stayed on the moon. Forever. 🚀

What kind of engine would NASA trust with this kind of responsibility? One using hypergolic propellants. Think of them as a high-stakes chemical handshake; they ignite the moment they touch. No need for a separate igniter, just raw, immediate power.

This might sound like flirting with disaster, but every Apollo mission succeeded. How? Rigorous checks and an almost obsessive attention to detail ensured reliability. So, with one shot and no wiggle room, NASA brought everyone home.

Precision engineering and human courage made it all possible. Tag someone who needs to know this.