Never mind space elevators - we could build useful sky hooks right now (and Mars might be the best place to do it...) https://youtu.be/dqwpQarrDwk https://youtu

Never mind space elevators - we could build useful sky hooks right now (and Mars might be the best place to do it...) https://youtu.be/dqwpQarrDwk https://youtu.be/dqwpQarrDwk