There are many explanations about the origin of human beings, behind each one there is a person who shouts because they are the only correct one. But one of the prevailing scientific explanations is that humans originated in Africa and subsequently spread throughout the world. But theology tells you that there is a powerful creator who created human beings, whether for slaves or for entertainment. Ancient astronaut theorists claim that the earth was visited by aliens long ago and that they created humans, either by accident or on purpose. I am not a believer in theology and I find the ancient astronaut theory lacking in hard evidence, so I will explain another important scientific theory about where life came from. But first I think it's important that we all come to a consensus on what the Out of Africa theory entails. My Africa. This theory states that all human life originated in Africa. At the time, Africa was very fertile. It was abundant in both plant and animal life. For this reason the chances that humans developed here are great, and then, due to climate change or the abundance of food, we became what we are today. Studies have shown that cooked food provides more nutrients than raw food. This leads to a pretty interesting hypothesis about why we are as smart as we are. As we moved and gathered in numbers, we needed more food to sustain the population. We also needed to find more efficient ways to get that food, meaning our brains needed to get bigger so we could develop more cognitive functions. This is where we run into our problem. A larger brain needs more nutrients to support it. So by solving one problem we created another. But luckily for us, cooked food provides more nutrients than raw food. Our brains probably start... halfway... with the fact that when the Incas discovered the site it was already in ruins. With the blocks already scattered here and there. When they found it they considered it sacred and perhaps defiled it. This is an extremely interesting and mysterious site, when I researched it I found more questions than answers. What is true? In the end, even after all the evidence is spread out on the table, there is really only one person's opinion that matters. I'd like to ask you what you've found easiest to believe about the evidence, but often it's the uncomfortable truth that ends up being the one we need to open our eyes to. Who spoke the most? DNA and fossil evidence? Or the religious and architectural phenomenon that is difficult to explain? Whether aliens or apes built civilization, no one could ever know for sure. But I hope I've given you enough information to make an informed decision.