What is this picture?

Question

What is shown in this image?

Accepted Answer

Radiator. # Radiator Fun Fact

The first car radiators actually worked *backwards* from how you'd expect—early automobiles used *gravity* to circulate coolant through the engine, which meant the radiator had to be positioned above the engine block, making cars look hilariously tall and awkward! It wasn't until the 1920s that the electric water pump was perfected, finally allowing radiators to move to the front of cars where they could catch airflow more efficiently.

Answer: Radiator