Ever wondered what $1bn could buy you? Well actually this won’t be of much use to you – if, however, you wanted to know what 10, 20, 50, 100 or 3000 billion dollars could buy you then it might come in handy.

If these figures are accurate it’s slightly scary to think that one man has the money to save the Amazon twice over, and that the internet porn industry generates enough revenue to feed and educate every child on Earth.

Peter Backus, has taken the Drake Equation (an equation formulated to estimate the number of extraterrestrial civilisations in the Milky Way that we might come in to contact with), and reapplied it to estimate the likely success of his own amourous exploits:

While extraterrestrial civilizations may be rare, there is something that is seemingly rarer still: A girlfriend. For me. What might the approach employed in the estimation of the number of alien civilizations tell us about the number of potential girlfriends for me? A somewhat less scientific question, I admit, but one of substantial personal importance.

40% of all mammal species are rodents.