One of our cats — Tikka — vanished last night. We saw her in the evening, and we didn’t think she could have snuck out. At bedtime, she was nowhere to be found in the house, and didn’t respond to calling outside. So I worried about that for a while.
She re-appeared, inside the house, in the morning, at breakfast time.
So I’m pretty sure we have a cat-sized wormhole. Or perhaps a worm-sized cathole.