Thanks for your great reply! Your points make a lot of sense, and refueling stations definitely seem spot on. It seems natural to start with a refueling station in Earth's orbit, and then using the

Thanks!

Very good questions. I use the Microsoft Band, because it has 10 sensors, so I can see things like my total UV exposure during the day. However, it is uploaded to Microsoft's servers, and although the

I find that language learning cards are very quick to go through. If I have 300 cards to practice, all it takes is a quick glance at the foreign or English side to recall, and I can finish a card in less