5 points
Talking about steam, steam-powered things are 2 thousand years old at least and we still use the technology when we crack atoms to make energy.
2 points
What the Romans had wasn’t comparable with an industrial steam engine. The working principle of steam pushing against a cylinder was similar, but they lacked the tools and metallurgy to build a steam cauldron that could be pressurized, so their steam engine could only do parlor tricks like opening a temple door once, and not perform real continuous work.
