What happens if a Black Hole “settles” near our Earth?

Earth and Black Hole

But what if a black hole literally appears on our doorstep. What happens if an “uninvited guest” with a size of 1 mm “settles” near our Earth? Physicists asked a similar question in 2008, when the Large Hadron Collider was launched. Then, many scientists, among whom was also Stephen Hawking, feared that this greatest invention