https://lifeboat.com/blog/2018/07/x-spacex-raptor-designer-has-ready-for-development-designs-for-nuclear-rocket-that-will-be-up-to-7-times-better-than-bfr Safeguarding Humanity Mon, 09 Jul 2018 21:02:57 +0000 hourly 1 https://wordpress.org/?v=6.6.2