Isolated black hole lensing a background of galaxies. Public domain. Wikimedia Commons.
I thoroughly enjoyed this podcast episode:
Vox’s Unexplainable: Do we live inside an enormous black hole?
An interesting question and thought experiment!
Neato Curiosities: Do We Live Inside an Enormous Black Hole?
Isolated black hole lensing a background of galaxies. Public domain. Wikimedia Commons.
Smuggling Grace 