Comments on: Did the LIGO gravitational waves originate from primordial black holes? https://lifeboat.com/blog/2016/07/did-the-ligo-gravitational-waves-originate-from-primordial-black-holes Safeguarding Humanity Tue, 25 Apr 2017 03:10:44 +0000 hourly 1 https://wordpress.org/?v=6.6.2