When was the steam engine created?

Answer 1

The mathematician and scientist Hero of Alexandria recorded experiments with the steam discharge device called the aeolipile around the first century AD, although Vitruvius may have built a model some 50 years earlier. Blasco De Garay used a steam device to propel a ship in 1543. A type of steam-powered pump was patented by Thomas Savery in 1598, the first practical steam engine.

Thomas Newcomen developed a piston engine powered by steam in 1712, but James Watt is credited with its improvement into an efficient device beginning in 1763. Watt's design used a separate chamber for condensing the steam, enabling most of the heat energy of the expanding steam to move its cylinders.