I just read a book by Michio Kaku that guy is insanely smart and also has the ability to make things understandable to average people. like me, for example.
Gravity isnt really a force its the illusion of a force, now stay with me. Gravity bends time and space around a center mass. For example its like placing a heavy rock on the center of a bed sheet and then giving a marble some velocity around the rock. From above it will appear to be attracted to the rock by some unknown force... A black hole is so dence and massive that the bed sheet has streched so far that it connects with another rock on the other side creating a worm hole. Einstein theroised that nothing could survive traveling through a worm hole because the center of the worm hole would have infinite gravity thus crushing anything that traveled through into atoms. However nature never deals in infintencies. Since the black hole is spinning at a tremendous rate. (about a million miles an hour) the centripital acceleration and thus force keeps the middle of the worm hole from colapsing.
- That was super paraphrased because I dont have the book on me and dont quote me on the numbers but it was very intresting to read.
If you are truly intrested in theroitical physics and the cosmos and dont just want to talk out you ass about the universe here are some required reading
The Universe in a nutshell and The Breif History of time, by Steven Hawking
Visions, Hyperspace, and Parallel Worlds, by Michio Kaku
There is a lot more but those are the ones I enjoyed expecially Vision that book was great. Another really intersting topic is Genetics and Nanotechnology which he discusses.
Oh ya to understand that bed sheet comparision you have to realize that Kaku belives and has some theroitical "proof" that there are actually Inifinite number of Universies and about 11 deminsions, dont ask me to explain that one...