Should we be talking about a one-world government to head off existential threats? What about schemes to preserve human genetic information, or launch relics from our civilisation to land on the moon?  Is worrying about the end of the world even worthwhile? What can we practically do to reduce the risks for our civilisation? These are the questions that this, the very last episode in our TEOTWAWKI series (okay... for now...) will explore. Questions? Comments? Concerns? Twitter: @physicspod Facebook: Physical Attraction Website: www.physicspodcast.com -> where you'll find every episode we've ever released, -> a contact form for more information and to send in your listener questions, -> and our Patreon and Paypal accounts for donations. As always, the best way to help out with what we do is to tell everyone about the show. And don't forget you can listen to our sister podcast, Autocracy Now, about the lives of various dictators - currently Stalin - wherever you listen to podcasts, or at www.autocracynow.libsyn.com  We're having a week to write and research and when we come back, we'll be talking about Isaac Newton.