Are closed timelike curves impossible or possible in the real universe?

Question

http://en.wikipedia.org/wiki/Closed_Timelike_Curve

Answer 1

dude.

read your own link

"IF!!!!!!!!!! CTCs exist"

http://en.wikipedia.org/wiki/Closed_Time...

people here on YA cannot create new discoveries in physics and in time and space.

this type of question will not be answered for at least 3 years.

CERN

Ronald Mallett

Answer 2

Well, we'll know that at the end of time. if it repeats itself, then we're inside a close universe, or positively curved space-time. If it goes eternally without repeating, then we're inside an open universe, or negatively closed space-time..