About them dragons

[timelets]

https://www.bloomberg.com/news/articles/2019-03-03/spacex-crew-dragon-docks-with-international-space-station

SpaceX’s Crew Dragon unmanned craft successfully docked with the International Space Station on Sunday, a key milestone for chief executive officer Elon Musk, his team and the American space agency.

It would be an interesting problem to calculate the rate of innovation and capital required to build a human habitat on Mars for 1,000 people by 2120.