https://lifeboat.com/blog/2016/04/robotic-in-orbit-assembly-of-massive-sails-and-laser-propulsion-elements-for-fast-travel-anywhere-in-the-solar-system-and-beginner-interstellar-capability Safeguarding Humanity Sun, 04 Jun 2017 17:35:12 +0000 hourly 1 https://wordpress.org/?v=6.5.3