In this week's questions show, I answer whether or not dark matter could become a black hole, how do we know the Universe is flat, and what would happen to the world's market for precious metals once we start mining asteroids? Natalie Hinkel, SWRIhttp://www.nataliehinkel.com/Follow Natalie on Twitter:https://twitter.com/natalie_hinkel/00:26 Can dark matter turn into a black hole? 05:07 If the Universe is flat, how can it be expanding? 19:09 Why do we need a reason for an accelerating Universe? I gather a bunch up each week and answer them here.