prospera dad was the legendary publisher of the slyly subversive magazine.glossy pop culture. prospera's farm is mere 20 miles from johannesburg. >> you see the city there? >> yeah. to have all this in sight of the city. near his farm and hidden within the city's shadow is what's known as the cradle of humankind. a unesco world heritage site. an incredible look back at where we, the human animal, came from. >> it's a classic little sink hole. >> there are loads of these. this is what this area is. the cradle. it's called a cradle. now a world heritage site. because 60% of all the evidence for human evolution comes out of the valley. it's from caves like this that keep the record. that geology just conspires to preserve fossils. they're very, very rare things, but they're found more here in the last ten years than they're found anywhere. so you're home. this is where you started. >> this is my ancestral homeland? >> this is your ancestral homeland. ♪ >> that sound makes me happy. what does that sound remind you of, guys? what does that evoke for you, that sou