Monkeys have existed on Earth for millions and millions of years.
They have lived and worked on this planet since before the time of the dinosaurs,
when the Earth was still a churning molten sea of lava.

This is the treacherous landscape of Earth billions, or even millions, of years ago.
(dramatization)

Eventually, monkeys developed tools and learned to unlock the power of eating things.
After that, the possibilities were limitless...