Carl Sagan Explains the Dirac Equation.

It's the Drake Equation, after Frank Drake of Cornell

Video version of @EckhartAurelius's new poem, "Catharsis" This is truly worth watching!

This was a masterful explanation of the Drake Equation. Truth be told, I would enjoy hearing Carl make a go of the Dirac Equation.

Incredible. We cannot be alone. But it takes billions of years to create intelligent beings.

Just like little children making up stories then

Not Dirac Equation, but Drake Equation. Created by Frank Drake, one of the founders of SETI.

Humans appeared about a Million years ago, as per fossil record...our current progress..to cellular phone etc, took us about 2000 years...IF HUMANS appeared million years ago then, don't you think that in the FIRST 10k years they could have progressed so much...YES.. ALIENS

it is not the Dirac's equation, it's the Drake's equation.

Fascinating and also scary

Dark Forest theory!

Life as we know it. But silicon base organisms can exist and is also life.