How much energy would be required to create a black hole such that the event horizon is the diameter of one femtometer, since black holes themselves are points? - Quora
![Scientists detect tones in the ringing of a newborn black hole for the first time | MIT News | Massachusetts Institute of Technology Scientists detect tones in the ringing of a newborn black hole for the first time | MIT News | Massachusetts Institute of Technology](https://news.mit.edu/sites/default/files/styles/news_article__image_gallery/public/images/201909/MIT-Black-Hole-Ringing_0.jpg?itok=-lbKP9vr)
Scientists detect tones in the ringing of a newborn black hole for the first time | MIT News | Massachusetts Institute of Technology
![Brian Greene on Twitter: "Hawking radiation has never been detected because the temperature of a typical black hole is miniscule. Using the formula, the Hawking temperature of a solar mass black hole Brian Greene on Twitter: "Hawking radiation has never been detected because the temperature of a typical black hole is miniscule. Using the formula, the Hawking temperature of a solar mass black hole](https://pbs.twimg.com/media/D3W6xNJWkAA7BmO.jpg)