“So you’d think that, to a first approximation, the Earth is inhabitable by human beings…In fact, to a first approximation, from the perspective of prospective interstellar colonists, the Earth is uninhabitable…Currently, a random meat probe dropped on the Earth’s surface has something like a 15% chance of finding it survivable. But a random sampling over the historical epoch would return a survivability probability of around 1%.” – Charlie Stross