system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: what are wormholes, and are they real?
gpt
A wormhole is basically a hole that connects two places in space time.  It has an opening at both ends, with a tunnel between the two.  In theory, it's meant to join two far apart places, because traveling through it is meant to be much quicker than traveling as the crow flies, some scientists even postulating that traveling through them could enable faster than light travel.

It's all theory.  There's never been an observed wormhole.  Physicists have done equations and things in which a wormhole could feature, but we've never seen one and have no definitive proof they exist.