http://gulfstrategic.com/gc/wp-content/uploads/logo_final.jpg00PR PRhttp://gulfstrategic.com/gc/wp-content/uploads/logo_final.jpgPR PR2024-08-22 13:02:202024-08-22 17:06:23Some black holes have a 'heartbeat' — and astronomers may finally know why - Livescience.com
