An incarnation is a life in a physical body meant to teach us lessons that will evolve our souls. It can be any type of life or possibly even in a man-made lifeform. It can be on any planet that has life. We are fortunate to be humans, one of the highest lifeforms on this planet, and since we can be incarnated in any time period, are even more blessed to witness the age of the internet, video games, and other technology. Some souls may even incarnate into a piece of intelligent technology itself, such as a top-of-the-line AI robot. Although it's not biological, a robot may learn from its AI, therefore helping to teach a soul even more lessons.