In this week's questions show, I explain that life on Earth has less time than you think, if there could be multiple supermassive black holes inside the Milky Way, and what would we see if Mars replaced the Moon. Featuring Anton Petrov from WhatDaMath. Check out his channel here:https://www.youtube.com/channel/UCciQ8wFcVoIIMi-lfu8-cjQ00:29 When will the Earth be unlivable? 03:00 Are there more supermassive black holes inside the Milky Way? 15:35 Could Alpha Centauri see the Earth?