I always wondered if black holes weren't caused by intelligent civilizations that managed to build a technology to travel up to the threshold of light speed; as the "craft" approached, it's mass becomes infinite causing it to implode upon itself in an instance due to gravity leaving behind a black hole and the remnants of it's civilization... Fermi paradox in action.,(reply>), ʜɪᴛ ᴍᴇ ᴜᴘ ☝️☝️ɪ ɢᴏᴛ ꜱᴏᴍᴇᴛʜɪɴɢ ꜱᴘᴇᴄɪᴀʟ ꜰᴏʀ ʏᴏᴜ 🎁🎁..