Re: Relativity claims to have proven that parallel lines meet.

Extra dimensions are one of the untestable hypotheses mentioned in this
article, which says, "These unprovable hypotheses are quite different
from those that relate directly to the real world and that are testable
through observations."
“Defend the integrity of physics”
http://www.nature.com/news/scientiYc-method-defend-the-integrity-of-physics-1.16535
Relativity would have to prove other dimensions to prove that space is
curved and that parallel lines meet.