Nothing Is Fool-proof To A Sufficiently Talented

If Any One Of About 40 Physical Qualities Had More Than Slightly Different Values, Life As We Know It Could Not Exist.

A Model Is A Good Model If First It Interprets A Wide Range Of Observations In Terms Of A Simple And Elegant Model, And Second If The Model Makes Definite Predictions That Can Be Tested, And Possibly Falsified, By Observation.

"sooner Or Later Disasters Such As An Asteroid Collision Or A Nuclear War Could Wipe Us All Out, But Once We Spread Out Into Space And Establish Independent Colonies, Our Future Should Be Safe."

God Not Only Plays Dice, He Throws Them In The Corner Where You Can't See Them.

We Only Have To Look At Ourselves To See How Intelligent Life Might Develop Into Something We Wouldnt Want To Meet. I Imagine They Might Exist In Massive Ships, Having Used Up All The Resources From Their Home Planet. Such Advanced Aliens Would Perhaps Become Nomads, Looking To Conquer And Colonize Whatever Planets They Can Reach.