What is the Hero's engine?
A globe
Steam turbine
The airship
A hot air balloon
An aeolipile (or aeolipyle, or eolipile), also known as a Hero's engine, is a simple bladeless radial steam turbine which spins when the central water container is heated. In the 1st century AD, Hero of Alexandria described the device in Roman Egypt, and many sources give him the credit for its invention.
reach: rather globalantiquityinventions
Answers by country
A globe
Steam turbine
The airship
A hot air balloon
answers
Australia17
India21
Canada11
the United States45
Poland1798
the United Kingdom35
Republic of Ireland11
Austria19
Greece16
Germany94
Switzerland12