The history of olive oil.

From harvest to olive oil. (Nocellara del belice)
Olive oil has played an important role in people’s lives for thousands of years.
In simple terms, the olive is the fruit of an evergreen, and olive oil is essentially what is squeezed from the olive. Because of its slow growth, the olive tree may take up to ten years or more before producing well. After that, the tree can produce fruit for hundreds of years.
The production of olive oil begins by crushing the olives under millstones. The crushing produces a paste that is placed under hydraulic presses to extract the juices. This is no ordinary fruit juice, however. It is actually a mix of water and oil. After the water has been removed, the oil is graded, stored, and bottled for consumption.