Talk:Godzilla/@comment-24175751-20150306061910/@comment-3367060-20150602011707

Uh, black holes don't just come from supernovas. If you shrunk the Earth down to the size of a tennis ball, you would have a black hole.

So manmade or not, black holes are formed the same way, by packing a TON of mass into a Schwarzchild radius.