People often ask, "How close are we to sending humans to Mars" and it's not surprising given the optimistic presentations by Elon Musk and others. However, Mars is just too far away to send humans at this stage.

This originated as my answer to a question on the Quora question and answer site: "In what general knowledge domains do alternatives to Wikipedia exist that are significantly superior?". Of course there are examples of much better specialist encyclopedias for various knowledge domains. But you can also do better than Wikipedia using content derived from Wikipedia itself. I think my own new wikis are an example of this, for a simple reason. Because we can fix various errors that can't be fixed there and add new content that can't be added there.

If you search Wikipedia for present day habitats on Mars, then you will find many articles about Mars colonization, but on the idea that there might be microhabitats for present day life there, you'll find almost nothing. You'll find my Present day Mars habitability analogue environments on Earth but nothing about the possible habitats they are analogues of. So why is this? Well there was an article on this until just a week or two ago, but it is now deleted.

Trump has had a lot of criticism after the summit, with many saying he conceded too much to Kim. I don’t think he did at all myself. The main thing he gave him was a meeting with him, and a couple of days of his time. And he built trust. He thinks that’s important. Previous presidents didn’t think it was important, they proceeded on a basis of distrust. He is trying something new.