system
Given the following post, respond as if you're commenting on Reddit:
human
[Futurama] How did scientists increase the speed of light and what did they increase it to?
gpt
Due to the intervening interplanetary wars (often thought to be caused by this event), records of this era are almost as hazy as those of the 20th century. The early 23rd century is marked by a rapid increase in interaction between alien species, especially from an Earth vantage point. Probably not that coincidentally, this is also the time when Star Trek really began to emerge as a fully fledged religion, later to catalyze the Star Trek Wars.

Anyway, despite the spottiness of the records, there is a fair amount of evidence for a theory that this universe-wide change was actually originated right here. Well, not here, specifically, in this room, but, you know, on Earth. It was actually about 400 feet that way, where that other building is over there. 

Professor Myra D. Hodgkins and Dr. Finneas M. Delglazier were working on an experiment to shrink things down. Now, you might be thinking, shrinking things by reducing the space between the atoms and/or subatomic particles is nonsensical, as then they'd weigh the same amount. And you'd be right! Hodgkins and Delglazier's miniaturization machine was based on the much more scientifically sound principle of size-vampiric neutrinoes. You see, the neutrinoes would pass through normal matter and suck the bigness, which we also call 'size', right out of them. The neutrinoes ended up being excessively large, which, it was theorized didn't matter because they just pass through everything without any palpable effect. Of course, since these large neutrinoes were still size-vampiric, they just kept passing through things and making them smaller, until within the course of a matter of moments, the entire universe had been shrunk to less than the size of a neutrino, which was of course rather large by this point, but still quite a bit smaller than the universe used to be.

The definition of what a "mile" or a "kilometer" is changed because every frame of reference changed, but the speed of photons, and related cosmic constants, remained the same as it was -- just, it became a larger number of miles because miles became so small.

Also, this happened so fast that hardly anyone noticed any difference. And most of the people who did see something strange, just thought it was their eyes playing tricks on them.