2 ms·
You can make black holes with massless particles: https://en.wikipedia.org/wiki/Kugelblitz_%28astrophysics%29 https://en.wikipedia.org/wiki/Kugelblitz_%28astrop
by flukus 8y ago
You can make black holes with massless particles: https://en.wikipedia.org/wiki/Kugelblitz_%28astrophysics%29 https://en.wikipedia.org/wiki/Kugelblitz_%28astrophysics%29