Humans weren't "invented" in the sense of someone designing us. We evolved over millions of years through a process called natural selection. Here's a simplified explanation:

* Evolution: This is the gradual change in the characteristics of living things over many generations. It's driven by:

* Variation: Individuals within a species have slightly different traits.

* Selection: Some traits are more beneficial for survival and reproduction in a given environment. These traits are passed on to offspring more often.

* Inheritance: Traits are passed from parents to offspring through genes.

* Human Evolution: Our ancestors were primates who lived in Africa. Over millions of years, they gradually evolved into modern humans through a series of changes, including:

* Bipedalism: Walking upright on two legs.

* Increased brain size: Leading to higher intelligence.

* Tool use: Developing complex tools for hunting and other tasks.

* Language development: Allowing for communication and complex social interactions.

It's important to remember:

* No single "inventor": Evolution doesn't have a designer. Changes occur naturally through the interplay of variation, selection, and inheritance.

* A long process: Human evolution took millions of years, with many different species branching off and going extinct along the way.

So, while there was no single "inventor" of humans, our existence is the result of a fascinating and complex evolutionary journey.