Board Thread:General Discussion/@comment-30937172-20181007201053/@comment-32182236-20181008163606

I say that line by Goner Kid doesn't fit in there, but instead to when Gaster split his mind and body-I don't think he was ever a human.

The machine was found in Sans' room, so it was almost certainly made underground. It wasn't to go into different timelines, it was to analyze them. And it all went well. Sans and Gaster looked through the timelines, and their findings showed a massive anomaly-This anomaly is Flowey, followed by Frisk.

"our reports showed a massive anomaly in the timespace continuum. timelines jumping left and right.. stopping and starting.. until eventually, everything ends."-Sans

The timelines stopping and starting came from the SAVE/LOAD ability. But then, it all ends. In Pacifist, the anomaly itself just stops, shortly after Frisk reaches the Surface. In Genocide.. Well, the ENTIRE WORLD ends.

I don't know what Gaster's final experiment actually WAS, but it must have had something to do with time itself. Something involving the space-time continuum. Perhaps he tried to modify the machine, and allow himself to observe the many timelines directly, trying to find out what exactly the anomaly IS, and why it all ends. However, it went wrong. VERY wrong. When it attempted to bring him across the timelines, for him to observe, it instead slowly took each part of him to different timelines.. Eventually, the fractures starting overloading the machine, enough for it to blow, sending Gaster backwards into the CORE. As he fell, the fractures continued to shatter, until eventually.. He just vanished without a trace. Only pieces of his memories remain.

The photo was Sans with Gaster and his followers, BEFORE they turned gray.

And that's my take on it all.