Musk: To be a Multi-Planetary Species, We Need To Develop Reusable Rockets

To be a multi-planetary species, Musk believes we have to develop fully reusable rockets. If every rocket launched 1,000 times, instead of just once, capital costs would plummet from $50 million to $50,000 per launch (not counting operational expenses) and could drive per pound launch costs down 100-fold.