**Use this interactive chart to figure out how many alien worlds exist across the ***entire universe*

*entire universe*

*BBC Future*, with the help of iib Studio, has put together a very cool interactive calculator that takes the Drake equation to the next level. Typically, the equation is used to estimate how many radio-transmitting civilizations could currently exist in the Milky Way Galaxy — but by adding just one extra variable, it lets you take the entire universe into account.