I recently put a bounty on this question Kinetic theory derivation of viscosity of a gas which is not my own. As such, at the moment to check if someone has answered it I am having to physically go onto that question (instead of just looking at my inbox). I think this is a wider issue, lets say there is a question which has been asked and I am interested to know the answer, if this question has currently no answer, I would have to keep going onto that question to see if an answer has been posted. So is there away to get notifications for other peoples question (perhaps even ones that I have no involvement in what so ever).