As A Child I Would Just Question

When We Got Tesla Going At The Very Beginning, If You Asked Me What I Thought The Odds Of Success Were, I Would Have Said Less Than 50%. I Would Have Said That Failure Is The Most Likely Outcome.

Mars Is The Only Place In The Solar System Where It's Possible For Life To Become Multi-planetarian.

Biofuels Such As Ethanol Require Enormous Amounts Of Cropland And End Up Displacing Either Food Crops Or Natural Wilderness, Neither Of Which Is Good.

You Need To Be In The Position Where It Is The Cost Of The Fuel That Actually Matters And Not The Cost Of Building The Rocket In The First Place.

The Primary Means Of Energy Generation Is Going To Solar. It Will At Least Be A Plurality, And Probably Be A Slight Majority In The Long Term.