The rocket landing stuff largely borrow from DC-X and the spinoff work at NASA (+Lars Blackmore), all originally Strategic Defense Initiative development.
He used all that money from Mike as collateral for loans to Tesla
Rome wasn't built in a day and were all standing on the shoulders of giants. However you need trailblazers to cut through and push the threshold. Elon is a hacker and disruptor and entrenched interests would like to just keep things they way they were, thereby pumping money into PR firms to talk down disruption and innovation. You're either a paid talk downer or a victim of that.
The rocket landing stuff largely borrow from DC-X and the spinoff work at NASA (+Lars Blackmore), all originally Strategic Defense Initiative development.
He used all that money from Mike as collateral for loans to Tesla