Internal combustion engine
From Tardis Wiki, the free Doctor Who reference
Romana II noted that Aoris had invented the internal combustion engine by Era 14. They used this technology to power their land vehicles. (AUDIO: The Paradox Planet)
Elsewhere, the people of Estebel were first shown the concept of the internal combustion engine by Prubert Gastridge. After its introduction, the inhabitants of the planet became more and more reliant on machines for everyday life. (PROSE: The Tomorrow Windows)
