Humans came along for the ride at the halfway point between life beginning on earth, about 4 billion years ago, and life ending in another 4 billion years, with the melting of the planet’s surface under an intensifying sun. Science fiction and other human projections are typically set in the myopic near future of at most a few thousand years – well how about an amount that is actually noticeable in the life of earth, say in one billion years?
Robert Walker 