https://lifeboat.com/blog/2018/08/the-pet-projects-elon-musk-jeff-bezos-and-other-billionaires-spend-their-fortunes-on-from-space-travel-to-immortality Safeguarding Humanity Wed, 22 Aug 2018 09:22:24 +0000 hourly 1 https://wordpress.org/?v=6.5.3