"the pattern of human population growth in the twentieth century was more bacterial than primate." — edward o. wilson
"we are a plague on the earth. it’s coming home to roost over the next fifty years or so. it’s not just climate change; it’s sheer space, places to grow food for this enormous horde." — david attenborough
around ten thousand years ago, there were maybe five million people on earth. two thousand years ago, there were probably two hundred million. today, there are over seven billion people, and that’s almost a billion more than there were just over a decade ago. in 2009, the number of people living in urban areas surpassed the number living in rural areas.
these photos were taken by chris hadfield (on tumblr) while commander of the international space station, showing, in order, (click pic) amman, istanbul, brussels, cairo, manila, london, delhi, boston, beijing, and guadalajara.