We Do Not Need To

One Of The Memorable Moments Of My Life Was When Willard Libby Came To Princeton With A Little Jar Full Of Crystals Of Barium Xenate. A Stable Compound, Looking Like Common Salt, But Much Heavier. This Was The Magic Of Chemistry, To See Xenon Trapped Into A Crystal.

It's Us That's Really Amazing. As Far As I Can See, Our Concentration Of Different Abilities In One Species - There's Nothing I Can See That In This Darwinian Evolution That Could've Done That. So It Seems To Be A Miracle Of Some Sort.

We Do Not Know How Much Of The Environmental Change Is Due To Human Activities And How Much [is Due] To Long-term Natural Processes Over Which We Have No Control.

If You Want To Have A Program For Moving Out Into The Universe, You Have To Think In Centuries Not In Decades.

The Universe In Some Sense Must Have Known That We Were Coming.