This is a tough question to answer! We cannot know how the first person on Earth was born. Humans became humans through the slow process of evolution.

The process of evolution involves a series of natural changes (or mutations) that cause organisms to arise, adapt to an environment, and become extinct.

The history explaining how life even began on Earth, starts a long time further back. The earliest undisputed evidence for life on Earth is found in rocks from Greenland dated to 3.7 billion years; it is a long, long time ago!

Generally scientists think that life began spontaneously out of non-living molecules and after a long time evolved into humans. The scientific assumption is that this process was unguided and happened simply because the correct conditions occurred for it to happen. I know that it is hard to imagine what a "long time" means, and how a non-living molecules evolved into humans, but it is only the scientific evidence what takes us to think that this was the way in which humans were born on Earth.

This question about the origin of life, and humanity’s place in it, motivated Charles Darwin (he was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution). After a trip sailing around the world and making numerous insightful observations, Darwin theorized that all life evolves by natural selection. Natural selection is the process through which populations of living organisms adapt and change.

On the other hand, scientists have found bones of humans, indicating that the first human existed approximately 500,000 years ago. We do not know the name of these human beings, but we know that when the first human being appeared on Earth, the dinosaurs were already extinct. There are ways to know the age of a bone, by using radioactive Carbon 14. This radioactive form of Carbon is present in the atmosphere and all living things absorb it.