If you take standard cosmological assumptions (the universe is infinite and homogeonous) then the odds are 100% as everything that is physically possible happens infinite times.
unless you mean the observable universe, in which case we dont know, but given the vast scale of it is likely very close to 1. We cant calculate it without knowing how likely life is to form in the first place.
I mean, the very useful bot that the mods have made mantadory on each post ranks the Sun as medium credibility same as the Guardian, so surely its a completly legit source.