As long as there have been universities, there have been tunnel worms.
The world's first university, as I am sure you are all aware, is not the University of Bologna, founded in 1088 AD, but the University of Atlantis, founded in 9600 BC.
One day, the son and daughter of one of the foremost Professors of Alchemy at the school decided to do what every young child wants to do: dig a hole through the Earth and come out on the other side. So, they got their spoons, and they started digging. After a while, they got new spoons, and they kept digging. Eventually, they broke through the crust of the Earth and fell through the Hollow Earth to the underside of the crust on the other side..
Recovered from the documents of the University of Atlantis' modern Sister School (and translated helpfully into modern English, for those of you who don't read Atlantian), we have this primary document, an account of the proceedings written by Tunnalia Worma, daughter of Professor Fakius Latinus.
14/27: It is very dark inside the Earth. My brother, Ninja Steve, and I have mostly recovered from the long fall we sustained when we broke through the crust of the earth. Father shall be so excited to learn that his theory is correct and that the Earth is indeed Hollow as an Orb of Glass. As of yet we have seen none of the ferocious lizard-beasts father said inhabit the place, but sometimes I have the strangest feeling that something is watching me.
14/28: Steve and I have recommenced our digging. After all, we have already made it halfway through, and now we are digging down, so it should be rather easier to emerge from the other side of the Earth. I merely hope that Father's co-worker Malum Newtonius is incorrect about the possibility of us falling off of bottom of the planet. Surely we will somehow stick to it?
14/29: I am getting very nervous. We hope that we have almost reached through the crust to the other side of the world, for our last spoons are very worn out. I cannot get rid of the apprehension I feel about being in this place. Something alien inhabits this place.
14/30:At night- or at least, we think it to be night, although who can tell in this midnight place?- we hear the roars of strange animals and the scraping of something on the rocks near us. Once I woke up in a terror to feel warm wetness across both of my ankles- a strange, sticky substance left behind by who knows what monstrosity of this deep. The same night, Steve awoke, screaming and bleeding from a cut on his hand. A cut made by some sort of tooth or claw, surrounded by the same stickiness I found on myself. What is this horror? I hope we are soon able to leave this place.
14/31: We must hurry. We have dug as fast as we can, for we cannot hope to escape them for much longer. The ground shakes, slime... slime in the deep. A shadow lurks in the dark. We must get out.... they are coming.*
At this point, the historical record abruptly breaks off. Modern scientists have concluded that Steve and Tunnalia most likely fell prey to the giant carnivorous worms that competed with the dinosaurs for any prey that found its way into the brutal ecosystem of the Hollow Earth. These worms, of course, are the ancestors of the tunnel worms that currently lurk beneath Brigham Young University.
Scientists have created this diagram to describe the situation.
As you can see, when Tunnalia and Steve broke through the crust beneath Atlantis, they fell down through the layers of the Hollow Earth, landing next to the crust beneath Provo. It is hypothesized that escaped tunnel worms from their entry hole may be related to the disappearance of Atlantis.
The other end of the children's tunnel was indeed on the other side of the world from Atlantis' location in the Indian Ocean. The tunnel they were digging was directly beneath modern-day Provo.
It is now necessary to study another historical document, this one a student journal kept by Gimgimno (not the Board writer), a student at the ancient University of Nephi, located in present-day Provo. The document has been graciously translated and provided to us by the archives of Brigham Young University. It was found during an excavation to prepare the foundation for Ira N Hinckley Hall.
I don't know why Professor Shiz is making us do this recording. How is writing about my life supposed to accomplish anything? Nothing interesting happens to me anyways. My stupid roommate Gadianton keeps yelling at me for pounding on the floor and waking him up at night, but I never do it! I don't know what's making those stupid scratchy noises underneath the rooms, but it's not me. We live in the basement, so there's nobody underneath us. Must be that campus construction again. I can hardly sleep at night, and I'm going to fail my Promised Land Heritage class if I can't wake up on time tomorrow. It's way over by the statue of President Massasoit, it takes me forever to get over there.
This record ends here, but excavated near the plates were two skulls, several bone fragments, and the remnants of a tunnel.
Researchers hypothesize that the tunnel worms found the nearly-completed tunnel Tunnalia and Steve had been working on and broke through the crust into Gimgimno's abode, devouring him before moving to the basement areas of the University of Nephi. The tunnel worms lived in these systems until the modern tunnels of Brigham Young University were built in the same general area. They then quickly infiltrated those tunnels, and live in them to this day.
They are there, and they are hungry.
~Anne, Certainly and Professor Kirke
*Yes, I just shamefully pilfered from the Lord of the Rings movie Mine of Moria scene. So sue me.