Planets and Population

The planet Mars is a very advanced planet: it’s entirely populated by robots. People haven’t set foot on Mars but that may change in the next 15 years or so.

The only extraterrestrial body that people have visited is the moon. And on their way to the moon, they got to see the entire earth. Those people are special in this sense: of the estimated 100,000,000,000 (a hundred billion) people who ever lived (around 7.5 billion of whom are alive now), only 24 people have seen the entire earth in one glance. Just ponder that thought for a moment. Only 24 out of billions and billions. Continue reading