It's the New York Times article that's linked to in this HN post about “the Interstitium”:

https://news.ycombinator.com/item?id=48095536

That article doesn’t explain why acupuncture works, just gives a hint of a possible mechanism. It also doesn’t contain any evidence that acupuncture works at all (other than as a placebo).

Radiolab did a show on that a couple years ago. Pretty interesting listen.

https://radiolab.org/podcast/interstitium

They also did an episode about rapamycin that I thought was really cool. I had no idea the history of it and found it fascinating and it really gets the imagination going thinking about what other things are hidden all around us.

https://radiolab.org/podcast/dirty-drug-and-ice-cream-tub