In this week's QA, I answer why space telescopes aren't a waste of taxpayer resources, if ground-based space telescopes will become obsolete, and whether it makes sense to crash phobos into Mars. 00:18 Waste of taxpayer money? 02:14 Will ground-based telescopes become obsolete? 03:50 Crash Phobos into Mars04:56 Should NASA collaborate with China? 08:09 Crop circles08:36 Problem with wearing a weight suit in zero gravity09:55 Methane rocket emissions10:57 Why does Titan have an atmosphere?