Board Thread:Wiki Discussion/@comment-31960778-20170721040405/@comment-32182236-20170818003320

There's no way to figure it out, but since nobody seems to know WHERE they came from, even though Papyrus is training under Undyne to be the Royal Guard (So Asgore and Undyne would probably keep track of where they were), things seem to be leaning on them appearing out of nowehere. They.. just showed up one day, and asserted themselves.

Gaster is likely a skeleton, just like Sans and Papyrus, and every time we've seen different characters of the same monster "type", they've been related. This even includes Snowdrake and Chilldrake:If Chilldrake was looking for Snowdrake ever since he ran away, he must have noticed this.. Chilldrake and Snowdrake are likely siblings. We have Sans and Papyrus, Toriel and Asgore.. And Asriel of course. Muffet has a buisness for the other spiders.

Now that we've established that, we can now connect Sans with Gaster. First off, we need to look at Sans' Lab. There's a ptcure of Sans and people you don't recognize. (No, they're not automatically humans. Monsters would be considered people too.) But.. Who are these people? More than likely Gaster and his followers, because of the note attatched:"don't forget". Why would it be so easy to forget, yet so important not to? What about these people having no longer existed, their very past wiped from the timeline? That would also explain the strange symbols that we can't read-They're written in Wingdings. As for the machine? ...We don't really know.

Sans has been trying to "go back". But, what does he mean by this? We know it's not the Surface, because of the VERY next line. What if he meant to go back to a world with Gaster, and that's why he was trying to fix the machine? Entry number 17 speaks of an interesting experiment with negative photon readings, and the darkness growing. This could be referring to the void, with the machine being a passageway through different timelines-One Sans could use to go back to before Gaster fell into his own creation.