In this week's life Q&A, I explain why we don't send animals to space any more, why I don't think we'll ever travel faster than the speed of light, and how graveyard orbits work. 00:35 Why don't we send animals to space anymore? 06:02 Will faster than light travel ever possible? 12:49 High resolution images of the Sun14:44 How do you refine metal in space? 22:49 Why we'll never build a space elevator24:40 Is Betelgeuse continuing to dim?