"Hello, everyone. Don't forget final projects are due next week," Sam said, once the students were seated. Around the room, they might notice some
pictures and video. On each desk was a fresh apple. "Today, as a treat, we'll be discussing
wormholes."
No, she wasn't kidding about the treat part. Sam thought this was the best subject ever.
"Wormholes get their name from the easiest way to describe them. If a worm is traveling over the skin of an apple, then the worm could take a shortcut to the opposite side of the apple's skin by burrowing through its center, rather than traveling the entire distance around, just as a wormhole traveler could take a shortcut to the opposite side of the universe through a topologically nontrivial tunnel. Or, in other words, the shortest distance between two points - even in space and time - is a straight line, just as it is when you're working with maps or the shortest route to the corner store. On the larger intergalactic scale, however, that straight line is called a wormhole."
Sam also went on to explain, in great and extensive detail, the difference between
black holes and
wormholes, as well as the fact that a collapsing black hole
would not cause a black hole.
"Of course, this is all purely theoretical," Sam finished, smiling slightly, "unless some of you know differently?"