Landmine e GPS (satellite navigation): o que têm em comum

1. Passo 1. Landmine — utiliza — Gunpowder. Chinese mines of the 13th century were filled with gunpowder.
2. Passo 2. Gunpowder — é utilizado em — Rocket. The first rockets were powered by gunpowder.
3. Passo 3. Rocket — evoluiu para — Liquid-propellant rocket engine. Goddard switched to liquid fuel.
4. Passo 4. Liquid-propellant rocket engine — faz parte de — Reusable rocket. Liquid-propellant engines.
5. Passo 5. Reusable rocket — tem como parte — GPS (satellite navigation). Navigation during landing.

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