[6SJ7]

I can’t think of the name of the scientist who came up with the equation for intelligent life in a galaxy, using what humans believe to be true about what it would take for intelligent life to exist. It’s not a generous estimate.....I think it’s Clark or something. But IIRC it’s 10, 10 intelligent species in our galaxy.

It's the Drake Equation. The trick is the value returned by the equation varies dramatically with the supplied parms and we can only guess at most of the values. So you can basically get any answer from zero to tens of thousands of intelligent alien species in the galaxy.

[IamCenny]

ya i know, i don’t feel like looking it up, but it’s like number of stars in the galaxy, divided by number of solar systems divided by number of planets, or something.