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The first steam engines were not pushed by steam, they were pulled by the vacuum left behind when it condensed

There is a common assumption about early steam power that inverts the actual mechanism, and correcting it makes the whole development sequence comprehensible. The assumption is that steam pushes. High ...
SlashGear

Here's How The World's First Steam Engines Worked

Technology tends to have a way of becoming smaller as it evolves. The ever-convenient microchip and lithium-ion battery serve in tandem as the brains of so many devices today, and their sleek and ...