Rockets Are Cool. There's No Getting Around

If We Could Do High-speed Rail In California Just Half A Notch Above What They've Done On The Shanghai Line In China, And If We Had A Straight Path From L.A. To San Francisco, As Well As The Milk Run, At Least That Would Be Progress.

I Realized That A Methane-oxygen Rocket Engine Could Achieve A Specific Impulse Greater Than 380.

Many Things Are Improbable, Only A Few Are Impossible.

I Don't Spend My Time Pontificating About High-concept Things; I Spend My Time Solving Engineering And Manufacturing Problems.

The Extension Of Life Beyond Earth Is The Most Important Thing We Can Do As A Species.