Talk:Gravity Manipulation/@comment-38850706-20191011140044/@comment-38876330-20191018173011

Relativity states that gravity is a force resulting from space-time curvature. For whatever reason, density (mass per unit volume) curves space-time, but a black hole won't lead to a worm hole. It is just a region that is so dense you'd essentially need negative mass to escape it's gravitational pull.

Think of a vacuum cleaner: sucks stuff in, and those things cannot escape on their own.