On average, a person will walk the equivalent of five times around the world in their lifetime: over two hundred quintillion (2·1018) steps.
Our species, Homo sapiens, appeared around 200,000 years ago in East Africa.
Our species, Homo sapiens, inhabited the world at the same time as other human species, often living in close proximity. In fact, Homo erectus, Homo floresiensis, Homo neaderthalensis, and Homo sapiens all co-inhabited the earth only 70,000 years ago.
While our species, Homo sapiens, has been around for about 200,000 years, several other species of early humans had survived for much longer before their extinction.