https://tauzero.aero/making-progress/propulsion-ideas/ 2017-02-07T02:17:45+00:00 weekly 0.6 https://tauzero.aero/making-progress/motives-and-perceptions/ 2017-02-03T03:00:42+00:00 weekly 0.6 https://tauzero.aero/making-progress/getting-there/ 2019-07-13T17:31:58+00:00 weekly 0.6