In Laetoli, Tanzania, the fossil footprints of three hominids have been discovered. They date back to over 3.5 million years ago and are the oldest footprints of bipedal primates in history. But the first true walkers in history belong to the genus Homo and appeared about 2 million years ago. They migrated in search of food, explored new territories, and moved incessantly. There is something of them in all of us, even today.