Although we could have a resource problem or an environmental conflict, the truth is that the Earth is almost empty of humans: we could all fit comfortably on the Iberian Peninsula with a population density similar to…

A pale blue dot is a photograph of Earth taken by the Voyager 1 space probe from a distance of 6 billion kilometers. The image shows the Earth as a speck or point of light that is almost imperceptible due to the glare...