Kate Wilhelm, "O Homo, O Femina, O Tempora"

A scientist believes time is slowing down.

(from The Seventh Omni Book of Science Fiction)

This story was kind of over before I was ready for it, and I'm not sure what I was supposed to get from it. There's this subtext with the wife dismissing the guy's supposedly earth-shattering discovery, and the guy has this rival who thinks time is speeding up, and also the guy seems utterly disoriented and... I don't know. Interesting ifnot satisfying.