Human Writes: Build cities that encourage walking

My little niece is taking her first steps. What a thrill for her, and for anyone who watches her walking – that awkward stagger, almost like a drunk, as she totters clumsily from one foot to the other.

Those first few steps signify her stride into her own life. They define her humanness: we humans walk on two feet. And how gracefully we do it too. We even dance and twirl and skate and do ballet. Chimps, by comparison, still walk with their backs horizontal to the ground.