Stephen Hawking declared: “We are running out of space, and the only places to go are other worlds. Now is the time to investigate other solar systems. Perhaps the only thing that can save us from ourselves is to spread out. Humans must depart from Earth, in my opinion.”

The entire world is very large. It is home to 8 billion people, more than 8 million animal species, and an enormous variety of plants and insects. We are all housed on it, and 71 per cent of it is covered in water. It also provides us with food and access to its resources.

The song was about my concern about running out of space on my computer - but the whole Stephen Hawking thing is much much more interesting.