I didn't know that. Sure, it doesn't sound like a revolutionary idea, and I'm not surprised at all its been thought of. I was basing it on the assumption there

I didn't know that. Sure, it doesn't sound like a revolutionary idea, and I'm not surprised at all its been thought of. I was basing it on the assumption there are people there already who aren't leaving. With a colony on Mars/Moon it surely becomes more useful to have a vast amount of steel to reuse than some crazy alloy. Electromagnetic catapult, huh. Sounds fun as hell.