That's interesting, Netizen. I didn't know that. Thanks for posting.
I may have mispoke. According to the video I linked in #47, the physicist says compasses wouldn’t work.
He also says that earth has reversed poles about 30 times in its history.
I guess its a slooooowwwww process.
I should add that the physicist says it doesn’t mean the end on the world and he makes fun of the movie Core.