[basicallydan]

I suppose this doesn't fit on Wikipedia, but obviously one possible cause is that Cats are aliens from a planet abut 3.4 million lightyears away, and during that 7 million year period, all the cats left Earth suddenly because their planet needed them [1]. They used a near-light-speed vehicle to get there, solved the crisis on their home planet, then returned to continue their stewardship of Earth, and then the vehicle flew back.

Publishers, line up

[1]: https://www.youtube.com/watch?v=J5k8ZQsZJpk

[hnuser123456]

It appears there are no galaxies between 3.26 and 3.9 ly away. Maybe they're from Andromeda at 2.5~3 ly, and took some time to accelerate and decelerate.

https://en.wikipedia.org/wiki/List_of_nearest_galaxies

[lcnPylGDnU4H9OF]

It's lightyears as measured in cat years.