Failure Is An Option Here.

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

It Would Take Six Months To Get To Mars If You Go There Slowly, With Optimal Energy Cost. Then It Would Take Eighteen Months For The Planets To Realign. Then It Would Take Six Months To Get Back, Though I Can See Getting The Travel Time Down To Three Months Pretty Quickly If America Has The Will.

There's A Real Opportunity To Have A Vertical Takeoff And Landing Electric Supersonic Jet.

I Think Most Of The Important Stuff On The Internet Has Been Built. There Will Be Continued Innovation, For Sure, But The Great Problems Of The Internet Have Essentially Been Solved.

America Is The Spirit Of Human Exploration Distilled.